Polish "Use try-with-resources to close resources automatically"

- Apply code formatting
- Use try-with-resources in many other places that were missed in the
  pull request

Closes gh-8045

spring-boot-actuator-docs/src/restdoc/java/org/springframework/boot/actuate/hypermedia/EndpointDocumentation.java

@@ -132,7 +132,8 @@ public class EndpointDocumentation {
 	@Test
 	public void auditEvents() throws Exception {
 		this.mockMvc
-				.perform(get("/application/auditevents").param("after", "2016-11-01T10:00:00+0000")
+				.perform(get("/application/auditevents")
+						.param("after", "2016-11-01T10:00:00+0000")
 						.accept(ActuatorMediaTypes.APPLICATION_ACTUATOR_V2_JSON))
 				.andExpect(status().isOk()).andDo(document("auditevents"));
 	}
@@ -188,15 +189,11 @@ public class EndpointDocumentation {
 		}
 		File file = new File(RESTDOCS_OUTPUT_DIR + "/endpoints.adoc");
 		file.getParentFile().mkdirs();
-		PrintWriter writer = new PrintWriter(file, "UTF-8");
-		try {
+		try (PrintWriter writer = new PrintWriter(file, "UTF-8")) {
 			Template template = this.templates.createTemplate(
 					new File("src/restdoc/resources/templates/endpoints.adoc.tpl"));
 			template.make(model).writeTo(writer);
 		}
-		finally {
-			writer.close();
-		}
 	}
 
 	private Collection<? extends MvcEndpoint> getEndpoints() {

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/HeapdumpMvcEndpoint.java

@@ -51,7 +51,7 @@ import org.springframework.web.bind.annotation.ResponseStatus;
  *
  * @author Lari Hotari
  * @author Phillip Webb
- * @author rajakolli
+ * @author Raja Kolli
  * @since 1.4.0
  */
 @ConfigurationProperties(prefix = "endpoints.heapdump")
@@ -146,9 +146,9 @@ public class HeapdumpMvcEndpoint extends AbstractNamedMvcEndpoint {
 		response.setHeader("Content-Disposition",
 				"attachment; filename=\"" + (heapDumpFile.getName() + ".gz") + "\"");
 		try (InputStream in = new FileInputStream(heapDumpFile);
-			GZIPOutputStream out = new GZIPOutputStream(response.getOutputStream())) {
-				StreamUtils.copy(in, out);
-				out.finish();
+				GZIPOutputStream out = new GZIPOutputStream(response.getOutputStream())) {
+			StreamUtils.copy(in, out);
+			out.finish();
 		}
 		catch (NullPointerException | FileNotFoundException ex) {
 		}

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/JmsHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,15 +35,11 @@ public class JmsHealthIndicator extends AbstractHealthIndicator {
 
 	@Override
 	protected void doHealthCheck(Health.Builder builder) throws Exception {
-		Connection connection = this.connectionFactory.createConnection();
-		try {
+		try (Connection connection = this.connectionFactory.createConnection()) {
 			connection.start();
 			builder.up().withDetail("provider",
 					connection.getMetaData().getJMSProviderName());
 		}
-		finally {
-			connection.close();
-		}
 	}
 
 }

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/CacheStatisticsAutoConfigurationTests.java

@@ -61,6 +61,7 @@ import static org.assertj.core.api.Assertions.offset;
  *
  * @author Stephane Nicoll
  * @author Eddú Meléndez
+ * @author Raja Kolli
  */
 @SuppressWarnings({ "rawtypes", "unchecked" })
 public class CacheStatisticsAutoConfigurationTests {

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointWebMvcAutoConfigurationTests.java

@@ -338,9 +338,8 @@ public class EndpointWebMvcAutoConfigurationTests {
 	@Test
 	public void specificPortsViaPropertiesWithClash() throws Exception {
 		int managementPort = ports.get().management;
-		ServerSocket serverSocket = new ServerSocket();
-		serverSocket.bind(new InetSocketAddress(managementPort));
-		try {
+		try (ServerSocket serverSocket = new ServerSocket()) {
+			serverSocket.bind(new InetSocketAddress(managementPort));
 			EnvironmentTestUtils.addEnvironment(this.applicationContext,
 					"server.port:" + ports.get().server,
 					"management.port:" + ports.get().management);
@@ -350,9 +349,6 @@ public class EndpointWebMvcAutoConfigurationTests {
 			this.thrown.expect(WebServerException.class);
 			this.applicationContext.refresh();
 		}
-		finally {
-			serverSocket.close();
-		}
 	}
 
 	@Test
@@ -683,23 +679,17 @@ public class EndpointWebMvcAutoConfigurationTests {
 				httpClient);
 		ClientHttpRequest request = requestFactory.createRequest(
 				new URI(scheme + "://localhost:" + port + url), HttpMethod.GET);
-		try {
-			ClientHttpResponse response = request.execute();
+		try (ClientHttpResponse response = request.execute()) {
 			if (HttpStatus.NOT_FOUND.equals(response.getStatusCode())) {
 				throw new FileNotFoundException();
 			}
-			try {
-				String actual = StreamUtils.copyToString(response.getBody(),
-						Charset.forName("UTF-8"));
-				if (expected instanceof Matcher) {
-					assertThat(actual).is(Matched.by((Matcher<?>) expected));
-				}
-				else {
-					assertThat(actual).isEqualTo(expected);
-				}
+			String actual = StreamUtils.copyToString(response.getBody(),
+					Charset.forName("UTF-8"));
+			if (expected instanceof Matcher) {
+				assertThat(actual).is(Matched.by((Matcher<?>) expected));
 			}
-			finally {
-				response.close();
+			else {
+				assertThat(actual).isEqualTo(expected);
 			}
 		}
 		catch (Exception ex) {

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/TomcatPublicMetricsTests.java

@@ -39,9 +39,8 @@ public class TomcatPublicMetricsTests {
 
 	@Test
 	public void tomcatMetrics() throws Exception {
-		AnnotationConfigServletWebServerApplicationContext context = new AnnotationConfigServletWebServerApplicationContext(
-				Config.class);
-		try {
+		try (AnnotationConfigServletWebServerApplicationContext context = new AnnotationConfigServletWebServerApplicationContext(
+				Config.class)) {
 			TomcatPublicMetrics tomcatMetrics = context
 					.getBean(TomcatPublicMetrics.class);
 			Iterator<Metric<?>> metrics = tomcatMetrics.metrics().iterator();
@@ -49,9 +48,6 @@ public class TomcatPublicMetricsTests {
 			assertThat(metrics.next().getName()).isEqualTo("httpsessions.active");
 			assertThat(metrics.hasNext()).isFalse();
 		}
-		finally {
-			context.close();
-		}
 	}
 
 	@Configuration

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/export/MetricCopyExporterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,18 +62,14 @@ public class MetricCopyExporterTests {
 	@Test
 	public void counterWithGaugeWriter() throws Exception {
 		SimpleGaugeWriter writer = new SimpleGaugeWriter();
-		MetricCopyExporter exporter = new MetricCopyExporter(this.reader, writer);
-		try {
+		try (MetricCopyExporter customExporter = new MetricCopyExporter(this.reader, writer)) {
 			this.reader.increment(new Delta<Number>("counter.foo", 2));
-			exporter.export();
+			customExporter.export();
 			this.reader.increment(new Delta<Number>("counter.foo", 3));
-			exporter.export();
-			exporter.flush();
+			customExporter.export();
+			customExporter.flush();
 			assertThat(writer.getValue().getValue()).isEqualTo(5L);
 		}
-		finally {
-			exporter.close();
-		}
 	}
 
 	@Test

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cache/InfinispanCacheConfiguration.java

@@ -40,6 +40,7 @@ import org.springframework.util.CollectionUtils;
  *
  * @author Eddú Meléndez
  * @author Stephane Nicoll
+ * @author Raja Kolli
  * @since 1.3.0
  */
 @Configuration

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/ldap/embedded/EmbeddedLdapAutoConfiguration.java

@@ -57,6 +57,7 @@ import org.springframework.util.StringUtils;
  *
  * @author Eddú Meléndez
  * @author Mathieu Ouellet
+ * @author Raja Kolli
  * @since 1.5.0
  */
 @Configuration

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/admin/SpringApplicationAdminJmxAutoConfigurationTests.java

@@ -127,8 +127,8 @@ public class SpringApplicationAdminJmxAutoConfigurationTests {
 		assertThat(this.context).isInstanceOf(ServletWebServerApplicationContext.class);
 		assertThat(this.mBeanServer.getAttribute(createDefaultObjectName(),
 				"EmbeddedWebApplication")).isEqualTo(Boolean.TRUE);
-		int expected = ((ServletWebServerApplicationContext) this.context)
-				.getWebServer().getPort();
+		int expected = ((ServletWebServerApplicationContext) this.context).getWebServer()
+				.getPort();
 		String actual = getProperty(createDefaultObjectName(), "local.server.port");
 		assertThat(actual).isEqualTo(String.valueOf(expected));
 	}
@@ -142,26 +142,17 @@ public class SpringApplicationAdminJmxAutoConfigurationTests {
 				.child(JmxAutoConfiguration.class,
 						SpringApplicationAdminJmxAutoConfiguration.class)
 				.web(WebApplicationType.NONE);
-		ConfigurableApplicationContext parent = null;
-		ConfigurableApplicationContext child = null;
 
-		try {
-			parent = parentBuilder.run("--" + ENABLE_ADMIN_PROP);
-			child = childBuilder.run("--" + ENABLE_ADMIN_PROP);
+		try (ConfigurableApplicationContext parent = parentBuilder
+				.run("--" + ENABLE_ADMIN_PROP);
+				ConfigurableApplicationContext child = childBuilder
+						.run("--" + ENABLE_ADMIN_PROP)) {
 			BeanFactoryUtils.beanOfType(parent.getBeanFactory(),
 					SpringApplicationAdminMXBeanRegistrar.class);
 			this.thrown.expect(NoSuchBeanDefinitionException.class);
 			BeanFactoryUtils.beanOfType(child.getBeanFactory(),
 					SpringApplicationAdminMXBeanRegistrar.class);
 		}
-		finally {
-			if (parent != null) {
-				parent.close();
-			}
-			if (child != null) {
-				child.close();
-			}
-		}
 	}
 
 	private ObjectName createDefaultObjectName() {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnSingleCandidateTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -145,17 +145,13 @@ public class ConditionalOnSingleCandidateTests {
 	@Test
 	public void singleCandidateMultipleCandidatesInContextHierarchy() {
 		load(FooPrimaryConfiguration.class, BarConfiguration.class);
-		AnnotationConfigApplicationContext child = new AnnotationConfigApplicationContext();
-		child.setParent(this.context);
-		child.register(OnBeanSingleCandidateConfiguration.class);
-		try {
+		try (AnnotationConfigApplicationContext child = new AnnotationConfigApplicationContext()) {
+			child.setParent(this.context);
+			child.register(OnBeanSingleCandidateConfiguration.class);
 			child.refresh();
 			assertThat(child.containsBean("baz")).isTrue();
 			assertThat(child.getBean("baz")).isEqualTo("foo");
 		}
-		finally {
-			child.close();
-		}
 	}
 
 	private void load(Class<?>... classes) {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/MessageSourceAutoConfigurationTests.java

@@ -143,9 +143,8 @@ public class MessageSourceAutoConfigurationTests {
 
 	@Test
 	public void existingMessageSourceInParentIsIgnored() {
-		ConfigurableApplicationContext parent = new AnnotationConfigApplicationContext();
-		parent.refresh();
-		try {
+		try (ConfigurableApplicationContext parent = new AnnotationConfigApplicationContext()) {
+			parent.refresh();
 			this.context = new AnnotationConfigApplicationContext();
 			this.context.setParent(parent);
 			EnvironmentTestUtils.addEnvironment(this.context,
@@ -156,9 +155,6 @@ public class MessageSourceAutoConfigurationTests {
 			assertThat(this.context.getMessage("foo", null, "Foo message", Locale.UK))
 					.isEqualTo("bar");
 		}
-		finally {
-			parent.close();
-		}
 	}
 
 	private void load(String... environment) {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraDataAutoConfigurationIntegrationTests.java

@@ -83,14 +83,10 @@ public class CassandraDataAutoConfigurationIntegrationTests {
 	}
 
 	private void createTestKeyspaceIfNotExists() {
-		Session session = this.cassandra.getCluster().connect();
-		try {
+		try (Session session = this.cassandra.getCluster().connect()) {
 			session.execute("CREATE KEYSPACE IF NOT EXISTS boot_test"
 					+ "  WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };");
 		}
-		finally {
-			session.close();
-		}
 	}
 
 }

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/diagnostics/analyzer/NoSuchBeanDefinitionFailureAnalyzerTests.java

@@ -235,20 +235,16 @@ public class NoSuchBeanDefinitionFailureAnalyzerTests {
 	}
 
 	private FatalBeanException createFailure(Class<?> config, String... environment) {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
-		this.analyzer.setBeanFactory(context.getBeanFactory());
-		EnvironmentTestUtils.addEnvironment(context, environment);
-		context.register(config);
-		try {
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext()) {
+			this.analyzer.setBeanFactory(context.getBeanFactory());
+			EnvironmentTestUtils.addEnvironment(context, environment);
+			context.register(config);
 			context.refresh();
 			return null;
 		}
 		catch (FatalBeanException ex) {
 			return ex;
 		}
-		finally {
-			context.close();
-		}
 	}
 
 	private FailureAnalysis analyzeFailure(Exception failure) {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -177,18 +177,14 @@ public class FreeMarkerAutoConfigurationTests {
 
 	@Test
 	public void renderNonWebAppTemplate() throws Exception {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
-				FreeMarkerAutoConfiguration.class);
-		try {
-			freemarker.template.Configuration freemarker = context
+		try (AnnotationConfigApplicationContext customContext = new AnnotationConfigApplicationContext(
+				FreeMarkerAutoConfiguration.class)) {
+			freemarker.template.Configuration freemarker = customContext
 					.getBean(freemarker.template.Configuration.class);
 			StringWriter writer = new StringWriter();
 			freemarker.getTemplate("message.ftl").process(this, writer);
 			assertThat(writer.toString()).contains("Hello World");
 		}
-		finally {
-			context.close();
-		}
 	}
 
 	@Test

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/EmbeddedDataSourceConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,22 +56,17 @@ public class EmbeddedDataSourceConfigurationTests {
 	@Test
 	public void generateUniqueName() throws Exception {
 		this.context = load("spring.datasource.generate-unique-name=true");
-		AnnotationConfigApplicationContext context2 = load(
-				"spring.datasource.generate-unique-name=true");
-		try {
+		try (AnnotationConfigApplicationContext context2 = load(
+				"spring.datasource.generate-unique-name=true")) {
 			DataSource dataSource = this.context.getBean(DataSource.class);
 			DataSource dataSource2 = context2.getBean(DataSource.class);
 			assertThat(getDatabaseName(dataSource))
 					.isNotEqualTo(getDatabaseName(dataSource2));
 		}
-		finally {
-			context2.close();
-		}
 	}
 
 	private String getDatabaseName(DataSource dataSource) throws SQLException {
-		Connection connection = dataSource.getConnection();
-		try {
+		try (Connection connection = dataSource.getConnection()) {
 			ResultSet catalogs = connection.getMetaData().getCatalogs();
 			if (catalogs.next()) {
 				return catalogs.getString(1);
@@ -80,9 +75,6 @@ public class EmbeddedDataSourceConfigurationTests {
 				throw new IllegalStateException("Unable to get database name");
 			}
 		}
-		finally {
-			connection.close();
-		}
 	}
 
 	private AnnotationConfigApplicationContext load(String... environment) {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jms/artemis/ArtemisAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -234,9 +234,8 @@ public class ArtemisAutoConfigurationTests {
 	@Test
 	public void severalEmbeddedBrokers() {
 		load(EmptyConfiguration.class, "spring.artemis.embedded.queues=Queue1");
-		AnnotationConfigApplicationContext anotherContext = doLoad(
-				EmptyConfiguration.class, "spring.artemis.embedded.queues=Queue2");
-		try {
+		try (AnnotationConfigApplicationContext anotherContext = doLoad(
+				EmptyConfiguration.class, "spring.artemis.embedded.queues=Queue2")) {
 			ArtemisProperties properties = this.context.getBean(ArtemisProperties.class);
 			ArtemisProperties anotherProperties = anotherContext
 					.getBean(ArtemisProperties.class);
@@ -249,29 +248,23 @@ public class ArtemisAutoConfigurationTests {
 			anotherChecker.checkQueue("Queue2", true);
 			anotherChecker.checkQueue("Queue1", true);
 		}
-		finally {
-			anotherContext.close();
-		}
 	}
 
 	@Test
 	public void connectToASpecificEmbeddedBroker() {
 		load(EmptyConfiguration.class, "spring.artemis.embedded.serverId=93",
 				"spring.artemis.embedded.queues=Queue1");
-		AnnotationConfigApplicationContext anotherContext = doLoad(
+
+		try (AnnotationConfigApplicationContext anotherContext = doLoad(
 				EmptyConfiguration.class, "spring.artemis.mode=embedded",
-				"spring.artemis.embedded.serverId=93", // Connect to the "main" broker
-				"spring.artemis.embedded.enabled=false"); // do not start a specific one
-		try {
+				"spring.artemis.embedded.serverId=93", /* Connect to the "main" broker */
+				"spring.artemis.embedded.enabled=false" /* do not start a specific one */)) {
 			DestinationChecker checker = new DestinationChecker(this.context);
 			checker.checkQueue("Queue1", true);
 
 			DestinationChecker anotherChecker = new DestinationChecker(anotherContext);
 			anotherChecker.checkQueue("Queue1", true);
 		}
-		finally {
-			anotherContext.close();
-		}
 	}
 
 	private TransportConfiguration assertInVmConnectionFactory(

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/embedded/EmbeddedMongoAutoConfigurationTests.java

@@ -108,9 +108,8 @@ public class EmbeddedMongoAutoConfigurationTests {
 
 	@Test
 	public void portIsAvailableInParentContext() {
-		ConfigurableApplicationContext parent = new AnnotationConfigApplicationContext();
-		parent.refresh();
-		try {
+		try (ConfigurableApplicationContext parent = new AnnotationConfigApplicationContext()) {
+			parent.refresh();
 			this.context = new AnnotationConfigApplicationContext();
 			this.context.setParent(parent);
 			this.context.register(EmbeddedMongoAutoConfiguration.class,
@@ -119,9 +118,6 @@ public class EmbeddedMongoAutoConfigurationTests {
 			assertThat(parent.getEnvironment().getProperty("local.mongo.port"))
 					.isNotNull();
 		}
-		finally {
-			parent.close();
-		}
 	}
 
 	@Test

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/SecurityAutoConfigurationTests.java

@@ -108,16 +108,12 @@ public class SecurityAutoConfigurationTests {
 
 	@Test
 	public void testFilterIsNotRegisteredInNonWeb() throws Exception {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
-		context.register(SecurityAutoConfiguration.class,
-				SecurityFilterAutoConfiguration.class,
-				PropertyPlaceholderAutoConfiguration.class);
-		try {
-			context.refresh();
-			assertThat(context.containsBean("securityFilterChainRegistration")).isFalse();
-		}
-		finally {
-			context.close();
+		try (AnnotationConfigApplicationContext customContext = new AnnotationConfigApplicationContext()) {
+			customContext.register(SecurityAutoConfiguration.class,
+					SecurityFilterAutoConfiguration.class,
+					PropertyPlaceholderAutoConfiguration.class);
+			customContext.refresh();
+			assertThat(customContext.containsBean("securityFilterChainRegistration")).isFalse();
 		}
 	}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/SecurityFilterAutoConfigurationEarlyInitializationTests.java

@@ -58,8 +58,7 @@ public class SecurityFilterAutoConfigurationEarlyInitializationTests {
 
 	@Test
 	public void testSecurityFilterDoesNotCauseEarlyInitialization() throws Exception {
-		AnnotationConfigServletWebServerApplicationContext context = new AnnotationConfigServletWebServerApplicationContext();
-		try {
+		try (AnnotationConfigServletWebServerApplicationContext context = new AnnotationConfigServletWebServerApplicationContext()) {
 			EnvironmentTestUtils.addEnvironment(context, "server.port:0",
 					"security.user.password:password");
 			context.register(Config.class);
@@ -70,10 +69,6 @@ public class SecurityFilterAutoConfigurationEarlyInitializationTests {
 			// If early initialization occurred a ConverterNotFoundException is thrown
 
 		}
-		finally {
-			context.close();
-		}
-
 	}
 
 	@Configuration

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/SecurityFilterAutoConfigurationTests.java

@@ -44,16 +44,11 @@ public class SecurityFilterAutoConfigurationTests {
 	@Test
 	public void filterAutoConfigurationWorksWithoutSecurityAutoConfiguration()
 			throws Exception {
-		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
-		context.setServletContext(new MockServletContext());
-		try {
+		try (AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext()) {
+			context.setServletContext(new MockServletContext());
 			context.register(Config.class);
 			context.refresh();
 		}
-		finally {
-			context.close();
-		}
-
 	}
 
 	@Configuration

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafServletAutoConfigurationTests.java

@@ -173,20 +173,17 @@ public class ThymeleafServletAutoConfigurationTests {
 
 	@Test
 	public void renderNonWebAppTemplate() throws Exception {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
+		try (AnnotationConfigApplicationContext customContext = new AnnotationConfigApplicationContext(
 				ThymeleafAutoConfiguration.class,
-				PropertyPlaceholderAutoConfiguration.class);
-		assertThat(context.getBeanNamesForType(ViewResolver.class).length).isEqualTo(0);
-		try {
-			TemplateEngine engine = context.getBean(TemplateEngine.class);
+				PropertyPlaceholderAutoConfiguration.class)) {
+			assertThat(customContext.getBeanNamesForType(ViewResolver.class).length)
+					.isEqualTo(0);
+			TemplateEngine engine = customContext.getBean(TemplateEngine.class);
 			Context attrs = new Context(Locale.UK,
 					Collections.singletonMap("greeting", "Hello World"));
 			String result = engine.process("message", attrs);
 			assertThat(result).contains("Hello World");
 		}
-		finally {
-			context.close();
-		}
 	}
 
 	@Test

spring-boot-cli/src/it/java/org/springframework/boot/cli/infrastructure/CommandLineInvoker.java

@@ -79,8 +79,7 @@ public final class CommandLineInvoker {
 				}
 
 			})[0];
-			ZipInputStream input = new ZipInputStream(new FileInputStream(zip));
-			try {
+			try (ZipInputStream input = new ZipInputStream(new FileInputStream(zip))) {
 				ZipEntry entry;
 				while ((entry = input.getNextEntry()) != null) {
 					File file = new File(unpacked, entry.getName());
@@ -89,22 +88,15 @@ public final class CommandLineInvoker {
 					}
 					else {
 						file.getParentFile().mkdirs();
-						FileOutputStream output = new FileOutputStream(file);
-						try {
+						try (FileOutputStream output = new FileOutputStream(file)) {
 							StreamUtils.copy(input, output);
 							if (entry.getName().endsWith("/bin/spring")) {
 								file.setExecutable(true);
 							}
 						}
-						finally {
-							output.close();
-						}
 					}
 				}
 			}
-			finally {
-				input.close();
-			}
 		}
 		File bin = new File(unpacked.listFiles()[0], "bin");
 		File launchScript = new File(bin, isWindows() ? "spring.bat" : "spring");

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/archive/ArchiveCommand.java

@@ -187,8 +187,7 @@ abstract class ArchiveCommand extends OptionParsingCommand {
 				List<MatchedResource> classpathEntries, List<URL> dependencies)
 						throws FileNotFoundException, IOException, URISyntaxException {
 			final List<Library> libraries;
-			JarWriter writer = new JarWriter(file);
-			try {
+			try (JarWriter writer = new JarWriter(file)) {
 				addManifest(writer, compiledClasses);
 				addCliClasses(writer);
 				for (Class<?> compiledClass : compiledClasses) {
@@ -196,9 +195,6 @@ abstract class ArchiveCommand extends OptionParsingCommand {
 				}
 				libraries = addClasspathEntries(writer, classpathEntries);
 			}
-			finally {
-				writer.close();
-			}
 			libraries.addAll(createLibraries(dependencies));
 			Repackager repackager = new Repackager(file);
 			repackager.setMainClass(PackagedSpringApplicationLauncher.class.getName());

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/init/ProjectGenerator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,6 @@ import org.springframework.util.StreamUtils;
  * Helper class used to generate the project.
  *
  * @author Stephane Nicoll
- * @since 1.2.0
  */
 class ProjectGenerator {
 
@@ -106,17 +105,13 @@ class ProjectGenerator {
 		if (!outputFolder.exists()) {
 			outputFolder.mkdirs();
 		}
-		ZipInputStream zipStream = new ZipInputStream(
-				new ByteArrayInputStream(entity.getContent()));
-		try {
+		try (ZipInputStream zipStream = new ZipInputStream(
+				new ByteArrayInputStream(entity.getContent()))) {
 			extractFromStream(zipStream, overwrite, outputFolder);
 			fixExecutableFlag(outputFolder, "mvnw");
 			fixExecutableFlag(outputFolder, "gradlew");
 			Log.info("Project extracted to '" + outputFolder.getAbsolutePath() + "'");
 		}
-		finally {
-			zipStream.close();
-		}
 	}
 
 	private void extractFromStream(ZipInputStream zipStream, boolean overwrite,

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/install/GroovyGrabDependencyResolver.java

@@ -36,7 +36,6 @@ import org.springframework.boot.cli.compiler.GroovyCompilerConfiguration;
  *
  * @author Dave Syer
  * @author Andy Wilkinson
- * @since 1.2.0
  */
 class GroovyGrabDependencyResolver implements DependencyResolver {
 
@@ -70,18 +69,14 @@ class GroovyGrabDependencyResolver implements DependencyResolver {
 	private String createSources(List<String> artifactIdentifiers) throws IOException {
 		File file = File.createTempFile("SpringCLIDependency", ".groovy");
 		file.deleteOnExit();
-		OutputStreamWriter stream = new OutputStreamWriter(new FileOutputStream(file),
-				"UTF-8");
-		try {
+		try (OutputStreamWriter stream = new OutputStreamWriter(
+				new FileOutputStream(file), "UTF-8")) {
 			for (String artifactIdentifier : artifactIdentifiers) {
 				stream.write("@Grab('" + artifactIdentifier + "')");
 			}
 			// Dummy class to force compiler to do grab
 			stream.write("class Installer {}");
 		}
-		finally {
-			stream.close();
-		}
 		// Windows paths get tricky unless you work with URI
 		return file.getAbsoluteFile().toURI().toString();
 	}

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/install/Installer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,7 +38,6 @@ import org.springframework.util.SystemPropertyUtils;
  * Shared logic for the {@link InstallCommand} and {@link UninstallCommand}.
  *
  * @author Andy Wilkinson
- * @since 1.2.0
  */
 class Installer {
 
@@ -82,13 +81,9 @@ class Installer {
 	}
 
 	private void saveInstallCounts() throws IOException {
-		FileWriter writer = new FileWriter(getInstalled());
-		try {
+		try (FileWriter writer = new FileWriter(getInstalled())) {
 			this.installCounts.store(writer, null);
 		}
-		finally {
-			writer.close();
-		}
 	}
 
 	public void install(List<String> artifactIdentifiers) throws Exception {

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/ExtendedGroovyClassLoader.java

@@ -98,14 +98,10 @@ public class ExtendedGroovyClassLoader extends GroovyClassLoader {
 	private Class<?> findSharedClass(String name) {
 		try {
 			String path = name.replace('.', '/').concat(".class");
-			InputStream inputStream = getParent().getResourceAsStream(path);
-			if (inputStream != null) {
-				try {
+			try (InputStream inputStream = getParent().getResourceAsStream(path)) {
+				if (inputStream != null) {
 					return defineClass(name, FileCopyUtils.copyToByteArray(inputStream));
 				}
-				finally {
-					inputStream.close();
-				}
 			}
 			return null;
 		}

spring-boot-cli/src/test/java/org/springframework/boot/cli/command/init/InitCommandTests.java

@@ -365,18 +365,14 @@ public class InitCommandTests extends AbstractHttpClientMockTests {
 
 	private byte[] createFakeZipArchive(String fileName, String content)
 			throws IOException {
-		ByteArrayOutputStream bos = new ByteArrayOutputStream();
-		ZipOutputStream zos = new ZipOutputStream(bos);
-		try {
+		try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
+				ZipOutputStream zos = new ZipOutputStream(bos)) {
 			ZipEntry entry = new ZipEntry(fileName);
 			zos.putNextEntry(entry);
 			zos.write(content.getBytes());
 			zos.closeEntry();
+			return bos.toByteArray();
 		}
-		finally {
-			bos.close();
-		}
-		return bos.toByteArray();
 	}
 
 	private static class TestableInitCommandOptionHandler

spring-boot-cli/src/test/java/org/springframework/boot/cli/command/init/InitializrServiceMetadataTests.java

@@ -92,14 +92,10 @@ public class InitializrServiceMetadataTests {
 	private static JSONObject readJson(String version) throws IOException, JSONException {
 		Resource resource = new ClassPathResource(
 				"metadata/service-metadata-" + version + ".json");
-		InputStream stream = resource.getInputStream();
-		try {
+		try (InputStream stream = resource.getInputStream()) {
 			return new JSONObject(
 					StreamUtils.copyToString(stream, Charset.forName("UTF-8")));
 		}
-		finally {
-			stream.close();
-		}
 	}
 
 }

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/livereload/LiveReloadServer.java

@@ -282,16 +282,10 @@ public class LiveReloadServer {
 
 		private void handle() throws Exception {
 			try {
-				try {
-					OutputStream outputStream = this.socket.getOutputStream();
-					try {
-						Connection connection = createConnection(this.socket,
-								this.inputStream, outputStream);
-						runConnection(connection);
-					}
-					finally {
-						outputStream.close();
-					}
+				try (OutputStream outputStream = this.socket.getOutputStream()) {
+					Connection connection = createConnection(this.socket,
+							this.inputStream, outputStream);
+					runConnection(connection);
 				}
 				finally {
 					this.inputStream.close();

spring-boot-devtools/src/main/java/org/springframework/boot/devtools/tunnel/client/TunnelClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -152,16 +152,12 @@ public class TunnelClient implements SmartInitializingSingleton {
 		public void run() {
 			try {
 				while (this.acceptConnections) {
-					SocketChannel socket = this.serverSocketChannel.accept();
-					try {
+					try (SocketChannel socket = this.serverSocketChannel.accept()) {
 						handleConnection(socket);
 					}
 					catch (AsynchronousCloseException ex) {
 						// Connection has been closed. Keep the server running
 					}
-					finally {
-						socket.close();
-					}
 				}
 			}
 			catch (Exception ex) {

spring-boot-samples/spring-boot-sample-custom-layout/src/test/java/sample/layout/Verify.java

@@ -27,8 +27,7 @@ public final class Verify {
 	}
 
 	public static void verify(File file, String entry) throws Exception {
-		ZipFile zipFile = new ZipFile(file);
-		try {
+		try (ZipFile zipFile = new ZipFile(file)) {
 			Enumeration<? extends ZipEntry> entries = zipFile.entries();
 			while (entries.hasMoreElements()) {
 				if (entries.nextElement().getName().equals(entry)) {
@@ -37,9 +36,6 @@ public final class Verify {
 			}
 			throw new AssertionError("No entry " + entry);
 		}
-		finally {
-			zipFile.close();
-		}
 	}
 
-}
+}

spring-boot-samples/spring-boot-sample-integration/src/test/java/sample/integration/consumer/SampleIntegrationApplicationTests.java

@@ -97,14 +97,10 @@ public class SampleIntegrationApplicationTests {
 						}
 						StringBuilder builder = new StringBuilder();
 						for (Resource resource : resources) {
-							InputStream inputStream = resource.getInputStream();
-							try {
+							try (InputStream inputStream = resource.getInputStream()) {
 								builder.append(new String(
 										StreamUtils.copyToByteArray(inputStream)));
 							}
-							finally {
-								inputStream.close();
-							}
 						}
 						return builder.toString();
 					}

spring-boot-samples/spring-boot-sample-jetty/src/test/java/sample/jetty/SampleJettyApplicationTests.java

@@ -64,21 +64,14 @@ public class SampleJettyApplicationTests {
 		HttpHeaders requestHeaders = new HttpHeaders();
 		requestHeaders.set("Accept-Encoding", "gzip");
 		HttpEntity<?> requestEntity = new HttpEntity<>(requestHeaders);
-
 		ResponseEntity<byte[]> entity = this.restTemplate.exchange("/", HttpMethod.GET,
 				requestEntity, byte[].class);
-
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
-
-		GZIPInputStream inflater = new GZIPInputStream(
-				new ByteArrayInputStream(entity.getBody()));
-		try {
+		try (GZIPInputStream inflater = new GZIPInputStream(
+				new ByteArrayInputStream(entity.getBody()))) {
 			assertThat(StreamUtils.copyToString(inflater, Charset.forName("UTF-8")))
 					.isEqualTo("Hello World");
 		}
-		finally {
-			inflater.close();
-		}
 	}
 
 }

spring-boot-samples/spring-boot-sample-tomcat/src/test/java/sample/tomcat/SampleTomcatApplicationTests.java

@@ -75,15 +75,11 @@ public class SampleTomcatApplicationTests {
 		ResponseEntity<byte[]> entity = this.restTemplate.exchange("/", HttpMethod.GET,
 				requestEntity, byte[].class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
-		GZIPInputStream inflater = new GZIPInputStream(
-				new ByteArrayInputStream(entity.getBody()));
-		try {
+		try (GZIPInputStream inflater = new GZIPInputStream(
+				new ByteArrayInputStream(entity.getBody()))) {
 			assertThat(StreamUtils.copyToString(inflater, Charset.forName("UTF-8")))
 					.isEqualTo("Hello World");
 		}
-		finally {
-			inflater.close();
-		}
 	}
 
 	@Test

spring-boot-samples/spring-boot-sample-undertow/src/test/java/sample/undertow/SampleUndertowApplicationTests.java

@@ -70,15 +70,12 @@ public class SampleUndertowApplicationTests {
 		ResponseEntity<byte[]> entity = this.restTemplate.exchange("/", HttpMethod.GET,
 				requestEntity, byte[].class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
-		GZIPInputStream inflater = new GZIPInputStream(
-				new ByteArrayInputStream(entity.getBody()));
-		try {
+
+		try (GZIPInputStream inflater = new GZIPInputStream(
+				new ByteArrayInputStream(entity.getBody()))) {
 			assertThat(StreamUtils.copyToString(inflater, Charset.forName("UTF-8")))
 					.isEqualTo("Hello World");
 		}
-		finally {
-			inflater.close();
-		}
 	}
 
 	private void assertOkResponse(String path, String body) {

spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/jdbc/TestDatabaseAutoConfigurationTests.java

@@ -60,16 +60,12 @@ public class TestDatabaseAutoConfigurationTests {
 		DataSource datasource = this.context.getBean(DataSource.class);
 		JdbcTemplate jdbcTemplate = new JdbcTemplate(datasource);
 		jdbcTemplate.execute("create table example (id int, name varchar);");
-		ConfigurableApplicationContext anotherContext = doLoad(
-				ExistingDataSourceConfiguration.class);
-		try {
+		try (ConfigurableApplicationContext anotherContext = doLoad(
+				ExistingDataSourceConfiguration.class)) {
 			DataSource anotherDatasource = anotherContext.getBean(DataSource.class);
 			JdbcTemplate anotherJdbcTemplate = new JdbcTemplate(anotherDatasource);
 			anotherJdbcTemplate.execute("create table example (id int, name varchar);");
 		}
-		finally {
-			anotherContext.close();
-		}
 	}
 
 	private void load(Class<?> config, String... environment) {

spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/restdocs/ContentContainingCondition.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,25 +42,13 @@ class ContentContainingCondition extends Condition<File> {
 
 	@Override
 	public boolean matches(File value) {
-		Reader reader = null;
-		try {
-			reader = new FileReader(value);
+		try (Reader reader = new FileReader(value)) {
 			String content = FileCopyUtils.copyToString(reader);
 			return content.contains(this.toContain);
 		}
 		catch (IOException ex) {
 			throw new IllegalStateException(ex);
 		}
-		finally {
-			if (reader != null) {
-				try {
-					reader.close();
-				}
-				catch (IOException ex) {
-					// Ignore
-				}
-			}
-		}
 	}
 
 }

spring-boot-tools/spring-boot-autoconfigure-processor/src/main/java/org/springframework/boot/autoconfigureprocessor/AutoConfigureAnnotationProcessor.java

@@ -201,13 +201,9 @@ public class AutoConfigureAnnotationProcessor extends AbstractProcessor {
 		if (!this.properties.isEmpty()) {
 			FileObject file = this.processingEnv.getFiler()
 					.createResource(StandardLocation.CLASS_OUTPUT, "", PROPERTIES_PATH);
-			OutputStream outputStream = file.openOutputStream();
-			try {
+			try (OutputStream outputStream = file.openOutputStream()) {
 				this.properties.store(outputStream, null);
 			}
-			finally {
-				outputStream.close();
-			}
 		}
 	}
 

spring-boot-tools/spring-boot-autoconfigure-processor/src/test/java/org/springframework/boot/autoconfigureprocessor/TestConditionMetadataAnnotationProcessor.java

@@ -62,15 +62,11 @@ public class TestConditionMetadataAnnotationProcessor
 		if (!file.exists()) {
 			return null;
 		}
-		FileInputStream inputStream = new FileInputStream(file);
-		try {
+		try (FileInputStream inputStream = new FileInputStream(file)) {
 			Properties properties = new Properties();
 			properties.load(inputStream);
 			return properties;
 		}
-		finally {
-			inputStream.close();
-		}
 	}
 
 }

spring-boot-tools/spring-boot-configuration-metadata/src/test/java/org/springframework/boot/configurationmetadata/ConfigurationMetadataRepositoryJsonBuilderTests.java

@@ -40,8 +40,7 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 
 	@Test
 	public void simpleRepository() throws IOException {
-		InputStream foo = getInputStreamFor("foo");
-		try {
+		try (InputStream foo = getInputStreamFor("foo")) {
 			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
 					.create(foo).build();
 			validateFoo(repo);
@@ -50,15 +49,11 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 					"spring.foo.counter");
 			assertThat(repo.getAllProperties()).hasSize(3);
 		}
-		finally {
-			foo.close();
-		}
 	}
 
 	@Test
 	public void hintsOnMaps() throws IOException {
-		InputStream map = getInputStreamFor("map");
-		try {
+		try (InputStream map = getInputStreamFor("map")) {
 			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
 					.create(map).build();
 			validateMap(repo);
@@ -67,16 +62,12 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 					"spring.map.keys", "spring.map.values");
 			assertThat(repo.getAllProperties()).hasSize(4);
 		}
-		finally {
-			map.close();
-		}
 	}
 
 	@Test
 	public void severalRepositoriesNoConflict() throws IOException {
-		InputStream foo = getInputStreamFor("foo");
-		InputStream bar = getInputStreamFor("bar");
-		try {
+		try (InputStream foo = getInputStreamFor("foo");
+				InputStream bar = getInputStreamFor("bar")) {
 			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
 					.create(foo, bar).build();
 			validateFoo(repo);
@@ -87,17 +78,12 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 					"spring.bar.counter");
 			assertThat(repo.getAllProperties()).hasSize(6);
 		}
-		finally {
-			foo.close();
-			bar.close();
-		}
 	}
 
 	@Test
 	public void repositoryWithRoot() throws IOException {
-		InputStream foo = getInputStreamFor("foo");
-		InputStream root = getInputStreamFor("root");
-		try {
+		try (InputStream foo = getInputStreamFor("foo");
+				InputStream root = getInputStreamFor("root")) {
 			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
 					.create(foo, root).build();
 			validateFoo(repo);
@@ -107,17 +93,12 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 					"spring.foo.counter", "spring.root.name", "spring.root2.name");
 			assertThat(repo.getAllProperties()).hasSize(5);
 		}
-		finally {
-			foo.close();
-			root.close();
-		}
 	}
 
 	@Test
 	public void severalRepositoriesIdenticalGroups() throws IOException {
-		InputStream foo = getInputStreamFor("foo");
-		InputStream foo2 = getInputStreamFor("foo2");
-		try {
+		try (InputStream foo = getInputStreamFor("foo");
+				InputStream foo2 = getInputStreamFor("foo2")) {
 			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
 					.create(foo, foo2).build();
 			assertThat(repo.getAllGroups()).hasSize(1);
@@ -132,16 +113,11 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 					"spring.foo.counter", "spring.foo.enabled", "spring.foo.type");
 			assertThat(repo.getAllProperties()).hasSize(5);
 		}
-		finally {
-			foo.close();
-			foo2.close();
-		}
 	}
 
 	@Test
 	public void emptyGroups() throws IOException {
-		InputStream in = getInputStreamFor("empty-groups");
-		try {
+		try (InputStream in = getInputStreamFor("empty-groups")) {
 			ConfigurationMetadataRepository repo = ConfigurationMetadataRepositoryJsonBuilder
 					.create(in).build();
 			validateEmptyGroup(repo);
@@ -149,16 +125,12 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 			contains(repo.getAllProperties(), "name", "title");
 			assertThat(repo.getAllProperties()).hasSize(2);
 		}
-		finally {
-			in.close();
-		}
 	}
 
 	@Test
 	public void builderInstancesAreIsolated() throws IOException {
-		InputStream foo = getInputStreamFor("foo");
-		InputStream bar = getInputStreamFor("bar");
-		try {
+		try (InputStream foo = getInputStreamFor("foo");
+				InputStream bar = getInputStreamFor("bar")) {
 			ConfigurationMetadataRepositoryJsonBuilder builder = ConfigurationMetadataRepositoryJsonBuilder
 					.create();
 			ConfigurationMetadataRepository firstRepo = builder.withJsonResource(foo)
@@ -175,10 +147,6 @@ public class ConfigurationMetadataRepositoryJsonBuilderTests
 			assertThat(secondRepo.getAllGroups()).hasSize(2);
 			assertThat(secondRepo.getAllProperties()).hasSize(6);
 		}
-		finally {
-			foo.close();
-			bar.close();
-		}
 	}
 
 	private void validateFoo(ConfigurationMetadataRepository repo) {

spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/MetadataStore.java

@@ -64,13 +64,10 @@ public class MetadataStore {
 
 	public void writeMetadata(ConfigurationMetadata metadata) throws IOException {
 		if (!metadata.getItems().isEmpty()) {
-			OutputStream outputStream = createMetadataResource().openOutputStream();
-			try {
+			try (OutputStream outputStream = createMetadataResource()
+					.openOutputStream()) {
 				new JsonMarshaller().write(metadata, outputStream);
 			}
-			finally {
-				outputStream.close();
-			}
 		}
 	}
 

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java

@@ -815,13 +815,9 @@ public class ConfigurationMetadataAnnotationProcessorTests {
 	}
 
 	private void writeMetadata(File metadataFile, JSONObject metadata) throws Exception {
-		FileWriter writer = new FileWriter(metadataFile);
-		try {
+		try (FileWriter writer = new FileWriter(metadataFile)) {
 			writer.append(metadata.toString(2));
 		}
-		finally {
-			writer.close();
-		}
 	}
 
 	private static class AdditionalMetadata {

spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/ApplicationPluginAction.java

@@ -83,12 +83,11 @@ final class ApplicationPluginAction implements PluginApplicationAction {
 	}
 
 	private String loadResource(String name) {
-		InputStreamReader reader = new InputStreamReader(
-				getClass().getResourceAsStream(name));
-		char[] buffer = new char[4096];
-		int read = 0;
-		StringWriter writer = new StringWriter();
-		try {
+		try (InputStreamReader reader = new InputStreamReader(
+				getClass().getResourceAsStream(name));) {
+			char[] buffer = new char[4096];
+			int read = 0;
+			StringWriter writer = new StringWriter();
 			while ((read = reader.read(buffer)) > 0) {
 				writer.write(buffer, 0, read);
 			}
@@ -97,14 +96,6 @@ final class ApplicationPluginAction implements PluginApplicationAction {
 		catch (IOException ex) {
 			throw new GradleException("Failed to read '" + name + "'", ex);
 		}
-		finally {
-			try {
-				reader.close();
-			}
-			catch (IOException ex) {
-				// Continue
-			}
-		}
 	}
 
 }

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/BuildPropertiesWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,18 +48,9 @@ public final class BuildPropertiesWriter {
 	public void writeBuildProperties(ProjectDetails projectDetails) throws IOException {
 		Properties properties = createBuildInfo(projectDetails);
 		createFileIfNecessary(this.outputFile);
-		FileOutputStream outputStream = new FileOutputStream(this.outputFile);
-		try {
+		try (FileOutputStream outputStream = new FileOutputStream(this.outputFile)) {
 			properties.store(outputStream, "Properties");
 		}
-		finally {
-			try {
-				outputStream.close();
-			}
-			catch (IOException ex) {
-				// Continue
-			}
-		}
 	}
 
 	private void createFileIfNecessary(File file) throws IOException {

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/FileUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -64,18 +64,14 @@ public abstract class FileUtils {
 	 */
 	public static String sha1Hash(File file) throws IOException {
 		try {
-			DigestInputStream inputStream = new DigestInputStream(
-					new FileInputStream(file), MessageDigest.getInstance("SHA-1"));
-			try {
+			try (DigestInputStream inputStream = new DigestInputStream(
+					new FileInputStream(file), MessageDigest.getInstance("SHA-1"))) {
 				byte[] buffer = new byte[4098];
 				while (inputStream.read(buffer) != -1) {
 					// Read the entire stream
 				}
 				return bytesToHex(inputStream.getMessageDigest().digest());
 			}
-			finally {
-				inputStream.close();
-			}
 		}
 		catch (NoSuchAlgorithmException ex) {
 			throw new IllegalStateException(ex);

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/JarWriter.java

@@ -49,7 +49,7 @@ import java.util.zip.ZipEntry;
  * @author Phillip Webb
  * @author Andy Wilkinson
  */
-public class JarWriter implements LoaderClassesWriter {
+public class JarWriter implements LoaderClassesWriter, AutoCloseable {
 
 	private static final String NESTED_LOADER_JAR = "META-INF/loader/spring-boot-loader.jar";
 
@@ -128,23 +128,24 @@ public class JarWriter implements LoaderClassesWriter {
 		Enumeration<JarEntry> entries = jarFile.entries();
 		while (entries.hasMoreElements()) {
 			JarEntry entry = entries.nextElement();
-			ZipHeaderPeekInputStream inputStream = new ZipHeaderPeekInputStream(
-					jarFile.getInputStream(entry));
-			try {
-				if (inputStream.hasZipHeader() && entry.getMethod() != ZipEntry.STORED) {
-					new CrcAndSize(inputStream).setupStoredEntry(entry);
-					inputStream.close();
-					inputStream = new ZipHeaderPeekInputStream(
-							jarFile.getInputStream(entry));
-				}
+			setUpStoredEntryIfNecessary(jarFile, entry);
+			try (ZipHeaderPeekInputStream inputStream = new ZipHeaderPeekInputStream(
+					jarFile.getInputStream(entry))) {
 				EntryWriter entryWriter = new InputStreamEntryWriter(inputStream, true);
 				JarEntry transformedEntry = entryTransformer.transform(entry);
 				if (transformedEntry != null) {
 					writeEntry(transformedEntry, entryWriter);
 				}
 			}
-			finally {
-				inputStream.close();
+		}
+	}
+
+	private void setUpStoredEntryIfNecessary(JarFile jarFile, JarEntry entry)
+			throws IOException {
+		try (ZipHeaderPeekInputStream inputStream = new ZipHeaderPeekInputStream(
+				jarFile.getInputStream(entry))) {
+			if (inputStream.hasZipHeader() && entry.getMethod() != ZipEntry.STORED) {
+				new CrcAndSize(inputStream).setupStoredEntry(entry);
 			}
 		}
 	}
@@ -234,6 +235,7 @@ public class JarWriter implements LoaderClassesWriter {
 	 * Close the writer.
 	 * @throws IOException if the file cannot be closed
 	 */
+	@Override
 	public void close() throws IOException {
 		this.jarOutput.close();
 	}

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/MainClassFinder.java

@@ -141,8 +141,7 @@ public abstract class MainClassFinder {
 		while (!stack.isEmpty()) {
 			File file = stack.pop();
 			if (file.isFile()) {
-				InputStream inputStream = new FileInputStream(file);
-				try {
+				try (InputStream inputStream = new FileInputStream(file)) {
 					ClassDescriptor classDescriptor = createClassDescriptor(inputStream);
 					if (classDescriptor != null && classDescriptor.isMainMethodFound()) {
 						String className = convertToClassName(file.getAbsolutePath(),
@@ -154,9 +153,6 @@ public abstract class MainClassFinder {
 						}
 					}
 				}
-				finally {
-					inputStream.close();
-				}
 			}
 			if (file.isDirectory()) {
 				pushAllSorted(stack, file.listFiles(PACKAGE_FOLDER_FILTER));
@@ -240,9 +236,8 @@ public abstract class MainClassFinder {
 		List<JarEntry> classEntries = getClassEntries(jarFile, classesLocation);
 		Collections.sort(classEntries, new ClassEntryComparator());
 		for (JarEntry entry : classEntries) {
-			InputStream inputStream = new BufferedInputStream(
-					jarFile.getInputStream(entry));
-			try {
+			try (InputStream inputStream = new BufferedInputStream(
+					jarFile.getInputStream(entry))) {
 				ClassDescriptor classDescriptor = createClassDescriptor(inputStream);
 				if (classDescriptor != null && classDescriptor.isMainMethodFound()) {
 					String className = convertToClassName(entry.getName(),
@@ -254,9 +249,6 @@ public abstract class MainClassFinder {
 					}
 				}
 			}
-			finally {
-				inputStream.close();
-			}
 		}
 		return null;
 	}

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Repackager.java

@@ -184,13 +184,9 @@ public class Repackager {
 		}
 		destination.delete();
 		try {
-			JarFile jarFileSource = new JarFile(workingSource);
-			try {
+			try (JarFile jarFileSource = new JarFile(workingSource)) {
 				repackage(jarFileSource, destination, libraries, launchScript);
 			}
-			finally {
-				jarFileSource.close();
-			}
 		}
 		finally {
 			if (!this.backupSource && !this.source.equals(workingSource)) {
@@ -221,21 +217,16 @@ public class Repackager {
 	}
 
 	private boolean alreadyRepackaged() throws IOException {
-		JarFile jarFile = new JarFile(this.source);
-		try {
+		try (JarFile jarFile = new JarFile(this.source)) {
 			Manifest manifest = jarFile.getManifest();
 			return (manifest != null && manifest.getMainAttributes()
 					.getValue(BOOT_VERSION_ATTRIBUTE) != null);
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	private void repackage(JarFile sourceJar, File destination, Libraries libraries,
 			LaunchScript launchScript) throws IOException {
-		JarWriter writer = new JarWriter(destination, launchScript);
-		try {
+		try (JarWriter writer = new JarWriter(destination, launchScript)) {
 			final List<Library> unpackLibraries = new ArrayList<>();
 			final List<Library> standardLibraries = new ArrayList<>();
 			libraries.doWithLibraries(new LibraryCallback() {
@@ -256,14 +247,6 @@ public class Repackager {
 			});
 			repackage(sourceJar, writer, unpackLibraries, standardLibraries);
 		}
-		finally {
-			try {
-				writer.close();
-			}
-			catch (Exception ex) {
-				// Ignore
-			}
-		}
 	}
 
 	private void repackage(JarFile sourceJar, JarWriter writer,
@@ -309,13 +292,9 @@ public class Repackager {
 
 	private boolean isZip(File file) {
 		try {
-			FileInputStream fileInputStream = new FileInputStream(file);
-			try {
+			try (FileInputStream fileInputStream = new FileInputStream(file)) {
 				return isZip(fileInputStream);
 			}
-			finally {
-				fileInputStream.close();
-			}
 		}
 		catch (IOException ex) {
 			return false;

spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/FileUtilsTests.java

@@ -102,13 +102,9 @@ public class FileUtilsTests {
 	@Test
 	public void hash() throws Exception {
 		File file = this.temporaryFolder.newFile();
-		OutputStream outputStream = new FileOutputStream(file);
-		try {
+		try (OutputStream outputStream = new FileOutputStream(file)) {
 			outputStream.write(new byte[] { 1, 2, 3 });
 		}
-		finally {
-			outputStream.close();
-		}
 		assertThat(FileUtils.sha1Hash(file))
 				.isEqualTo("7037807198c22a7d2b0807371d763779a84fdfcf");
 	}

spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/RepackagerTests.java

@@ -455,17 +455,14 @@ public class RepackagerTests {
 				callback.library(new Library(nestedFile, LibraryScope.COMPILE));
 			}
 		});
-		JarFile jarFile = new JarFile(file);
-		try {
+
+		try (JarFile jarFile = new JarFile(file)) {
 			assertThat(
 					jarFile.getEntry("BOOT-INF/lib/" + nestedFile.getName()).getMethod())
 							.isEqualTo(ZipEntry.STORED);
 			assertThat(jarFile.getEntry("BOOT-INF/classes/test/nested.jar").getMethod())
 					.isEqualTo(ZipEntry.STORED);
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	@Test
@@ -508,15 +505,12 @@ public class RepackagerTests {
 			}
 
 		});
-		JarFile jarFile = new JarFile(file);
-		try {
+
+		try (JarFile jarFile = new JarFile(file)) {
 			assertThat(
 					jarFile.getEntry("BOOT-INF/lib/" + nestedFile.getName()).getComment())
 							.startsWith("UNPACK:");
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	@Test
@@ -542,14 +536,10 @@ public class RepackagerTests {
 			}
 
 		});
-		JarFile jarFile = new JarFile(file);
-		try {
+		try (JarFile jarFile = new JarFile(file)) {
 			assertThat(jarFile.getEntry("BOOT-INF/lib/" + nestedFile.getName()).getSize())
 					.isEqualTo(sourceLength);
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	@Test
@@ -561,13 +551,9 @@ public class RepackagerTests {
 		File dest = this.temporaryFolder.newFile("dest.jar");
 		Repackager repackager = new Repackager(source);
 		repackager.repackage(dest, NO_LIBRARIES);
-		JarFile jarFile = new JarFile(dest);
-		try {
+		try (JarFile jarFile = new JarFile(dest)) {
 			assertThat(jarFile.getEntry("META-INF/INDEX.LIST")).isNull();
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	@Test
@@ -603,14 +589,10 @@ public class RepackagerTests {
 		File dest = this.temporaryFolder.newFile("dest.jar");
 		Repackager repackager = new Repackager(source);
 		repackager.repackage(dest, NO_LIBRARIES);
-		JarFile jarFile = new JarFile(dest);
-		try {
+		try (JarFile jarFile = new JarFile(dest)) {
 			assertThat(jarFile.getEntry("META-INF/aop.xml")).isNull();
 			assertThat(jarFile.getEntry("BOOT-INF/classes/META-INF/aop.xml")).isNotNull();
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	private boolean hasLauncherClasses(File file) throws IOException {
@@ -623,23 +605,15 @@ public class RepackagerTests {
 	}
 
 	private JarEntry getEntry(File file, String name) throws IOException {
-		JarFile jarFile = new JarFile(file);
-		try {
+		try (JarFile jarFile = new JarFile(file)) {
 			return jarFile.getJarEntry(name);
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	private Manifest getManifest(File file) throws IOException {
-		JarFile jarFile = new JarFile(file);
-		try {
+		try (JarFile jarFile = new JarFile(file)) {
 			return jarFile.getManifest();
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	private static class MockLauncherScript implements LaunchScript {

spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/TestJarFile.java

@@ -65,25 +65,17 @@ public class TestJarFile {
 	public void addFile(String filename, File fileToCopy) throws IOException {
 		File file = getFilePath(filename);
 		file.getParentFile().mkdirs();
-		InputStream inputStream = new FileInputStream(fileToCopy);
-		try {
+		try (InputStream inputStream = new FileInputStream(fileToCopy)) {
 			copyToFile(inputStream, file);
 		}
-		finally {
-			inputStream.close();
-		}
 	}
 
 	public void addManifest(Manifest manifest) throws IOException {
 		File manifestFile = new File(this.jarSource, "META-INF/MANIFEST.MF");
 		manifestFile.getParentFile().mkdirs();
-		OutputStream outputStream = new FileOutputStream(manifestFile);
-		try {
+		try (OutputStream outputStream = new FileOutputStream(manifestFile)) {
 			manifest.write(outputStream);
 		}
-		finally {
-			outputStream.close();
-		}
 	}
 
 	private File getFilePath(String filename) {
@@ -97,13 +89,9 @@ public class TestJarFile {
 
 	private void copyToFile(InputStream inputStream, File file)
 			throws FileNotFoundException, IOException {
-		OutputStream outputStream = new FileOutputStream(file);
-		try {
+		try (OutputStream outputStream = new FileOutputStream(file)) {
 			copy(inputStream, outputStream);
 		}
-		finally {
-			outputStream.close();
-		}
 	}
 
 	private void copy(InputStream in, OutputStream out) throws IOException {

spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/PropertiesLauncher.java

@@ -164,35 +164,34 @@ public class PropertiesLauncher extends Launcher {
 			}
 		}
 		for (String config : configs) {
-			InputStream resource = getResource(config);
-			if (resource != null) {
-				debug("Found: " + config);
-				try {
-					this.properties.load(resource);
+			try (InputStream resource = getResource(config)) {
+				if (resource != null) {
+					debug("Found: " + config);
+					loadResource(resource);
+					// Load the first one we find
+					return;
 				}
-				finally {
-					resource.close();
-				}
-				for (Object key : Collections.list(this.properties.propertyNames())) {
-					String text = this.properties.getProperty((String) key);
-					String value = SystemPropertyUtils
-							.resolvePlaceholders(this.properties, text);
-					if (value != null) {
-						this.properties.put(key, value);
-					}
-				}
-				if ("true".equals(getProperty(SET_SYSTEM_PROPERTIES))) {
-					debug("Adding resolved properties to System properties");
-					for (Object key : Collections.list(this.properties.propertyNames())) {
-						String value = this.properties.getProperty((String) key);
-						System.setProperty((String) key, value);
-					}
+				else {
+					debug("Not found: " + config);
 				}
-				// Load the first one we find
-				return;
 			}
-			else {
-				debug("Not found: " + config);
+		}
+	}
+
+	private void loadResource(InputStream resource) throws IOException, Exception {
+		this.properties.load(resource);
+		for (Object key : Collections.list(this.properties.propertyNames())) {
+			String text = this.properties.getProperty((String) key);
+			String value = SystemPropertyUtils.resolvePlaceholders(this.properties, text);
+			if (value != null) {
+				this.properties.put(key, value);
+			}
+		}
+		if ("true".equals(getProperty(SET_SYSTEM_PROPERTIES))) {
+			debug("Adding resolved properties to System properties");
+			for (Object key : Collections.list(this.properties.propertyNames())) {
+				String value = this.properties.getProperty((String) key);
+				System.setProperty((String) key, value);
 			}
 		}
 	}

spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/archive/ExplodedArchive.java

@@ -91,13 +91,9 @@ public class ExplodedArchive implements Archive {
 	@Override
 	public Manifest getManifest() throws IOException {
 		if (this.manifest == null && this.manifestFile.exists()) {
-			FileInputStream inputStream = new FileInputStream(this.manifestFile);
-			try {
+			try (FileInputStream inputStream = new FileInputStream(this.manifestFile)) {
 				this.manifest = new Manifest(inputStream);
 			}
-			finally {
-				inputStream.close();
-			}
 		}
 		return this.manifest;
 	}

spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/archive/JarFileArchive.java

@@ -145,23 +145,15 @@ public class JarFileArchive implements Archive {
 	}
 
 	private void unpack(JarEntry entry, File file) throws IOException {
-		InputStream inputStream = this.jarFile.getInputStream(entry, ResourceAccess.ONCE);
-		try {
-			OutputStream outputStream = new FileOutputStream(file);
-			try {
-				byte[] buffer = new byte[BUFFER_SIZE];
-				int bytesRead = -1;
-				while ((bytesRead = inputStream.read(buffer)) != -1) {
-					outputStream.write(buffer, 0, bytesRead);
-				}
-				outputStream.flush();
-			}
-			finally {
-				outputStream.close();
+		try (InputStream inputStream = this.jarFile.getInputStream(entry,
+				ResourceAccess.ONCE);
+				OutputStream outputStream = new FileOutputStream(file)) {
+			byte[] buffer = new byte[BUFFER_SIZE];
+			int bytesRead = -1;
+			while ((bytesRead = inputStream.read(buffer)) != -1) {
+				outputStream.write(buffer, 0, bytesRead);
 			}
-		}
-		finally {
-			inputStream.close();
+			outputStream.flush();
 		}
 	}
 

spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/Bytes.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2013 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,13 +35,9 @@ final class Bytes {
 	}
 
 	public static byte[] get(RandomAccessData data) throws IOException {
-		InputStream inputStream = data.getInputStream(ResourceAccess.ONCE);
-		try {
+		try (InputStream inputStream = data.getInputStream(ResourceAccess.ONCE)) {
 			return get(inputStream, data.getSize());
 		}
-		finally {
-			inputStream.close();
-		}
 	}
 
 	public static byte[] get(InputStream inputStream, long length) throws IOException {

spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java

@@ -160,17 +160,13 @@ public class JarFile extends java.util.jar.JarFile {
 				manifest = new JarFile(this.getRootJarFile()).getManifest();
 			}
 			else {
-				InputStream inputStream = getInputStream(MANIFEST_NAME,
-						ResourceAccess.ONCE);
-				if (inputStream == null) {
-					return null;
-				}
-				try {
+				try (InputStream inputStream = getInputStream(MANIFEST_NAME,
+						ResourceAccess.ONCE)) {
+					if (inputStream == null) {
+						return null;
+					}
 					manifest = new Manifest(inputStream);
 				}
-				finally {
-					inputStream.close();
-				}
 			}
 			this.manifest = new SoftReference<>(manifest);
 		}
@@ -335,9 +331,8 @@ public class JarFile extends java.util.jar.JarFile {
 		// Fallback to JarInputStream to obtain certificates, not fast but hopefully not
 		// happening that often.
 		try {
-			JarInputStream inputStream = new JarInputStream(
-					getData().getInputStream(ResourceAccess.ONCE));
-			try {
+			try (JarInputStream inputStream = new JarInputStream(
+					getData().getInputStream(ResourceAccess.ONCE))) {
 				java.util.jar.JarEntry certEntry = inputStream.getNextJarEntry();
 				while (certEntry != null) {
 					inputStream.closeEntry();
@@ -348,9 +343,6 @@ public class JarFile extends java.util.jar.JarFile {
 					certEntry = inputStream.getNextJarEntry();
 				}
 			}
-			finally {
-				inputStream.close();
-			}
 		}
 		catch (IOException ex) {
 			throw new IllegalStateException(ex);

spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/TestJarCreator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2013 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,8 +40,7 @@ public abstract class TestJarCreator {
 
 	public static void createTestJar(File file, boolean unpackNested) throws Exception {
 		FileOutputStream fileOutputStream = new FileOutputStream(file);
-		JarOutputStream jarOutputStream = new JarOutputStream(fileOutputStream);
-		try {
+		try (JarOutputStream jarOutputStream = new JarOutputStream(fileOutputStream)) {
 			writeManifest(jarOutputStream, "j1");
 			writeEntry(jarOutputStream, "1.dat", 1);
 			writeEntry(jarOutputStream, "2.dat", 2);
@@ -53,9 +52,6 @@ public abstract class TestJarCreator {
 			writeNestedEntry("nested.jar", unpackNested, jarOutputStream);
 			writeNestedEntry("another-nested.jar", unpackNested, jarOutputStream);
 		}
-		finally {
-			jarOutputStream.close();
-		}
 	}
 
 	private static void writeNestedEntry(String name, boolean unpackNested,

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/StartMojo.java

@@ -205,21 +205,18 @@ public class StartMojo extends AbstractRunMojo {
 			throws IOException, MojoFailureException, MojoExecutionException {
 		try {
 			getLog().debug("Connecting to local MBeanServer at port " + this.jmxPort);
-			JMXConnector connector = execute(this.wait, this.maxAttempts,
-					new CreateJmxConnector(this.jmxPort));
-			if (connector == null) {
-				throw new MojoExecutionException(
-						"JMX MBean server was not reachable before the configured "
-								+ "timeout (" + (this.wait * this.maxAttempts) + "ms");
-			}
-			getLog().debug("Connected to local MBeanServer at port " + this.jmxPort);
-			try {
+			try (JMXConnector connector = execute(this.wait, this.maxAttempts,
+					new CreateJmxConnector(this.jmxPort))) {
+				if (connector == null) {
+					throw new MojoExecutionException(
+							"JMX MBean server was not reachable before the configured "
+									+ "timeout (" + (this.wait * this.maxAttempts)
+									+ "ms");
+				}
+				getLog().debug("Connected to local MBeanServer at port " + this.jmxPort);
 				MBeanServerConnection connection = connector.getMBeanServerConnection();
 				doWaitForSpringApplication(connection);
 			}
-			finally {
-				connector.close();
-			}
 		}
 		catch (IOException ex) {
 			throw ex;

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/StopMojo.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -110,14 +110,11 @@ public class StopMojo extends AbstractMojo {
 
 	private void stopForkedProcess()
 			throws IOException, MojoFailureException, MojoExecutionException {
-		JMXConnector connector = SpringApplicationAdminClient.connect(this.jmxPort);
-		try {
+		try (JMXConnector connector = SpringApplicationAdminClient
+				.connect(this.jmxPort)) {
 			MBeanServerConnection connection = connector.getMBeanServerConnection();
 			doStop(connection);
 		}
-		finally {
-			connector.close();
-		}
 	}
 
 	private void stop() throws IOException, MojoFailureException, MojoExecutionException {

spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/Verify.java

@@ -198,14 +198,10 @@ public final class Verify {
 						.startsWith(new String(new byte[] { 0x50, 0x4b, 0x03, 0x04 }));
 			}
 
-			ZipFile zipFile = new ZipFile(this.file);
-			try {
+			try (ZipFile zipFile = new ZipFile(this.file)) {
 				ArchiveVerifier verifier = new ArchiveVerifier(zipFile);
 				verifyZipEntries(verifier);
 			}
-			finally {
-				zipFile.close();
-			}
 		}
 
 		protected void verifyZipEntries(ArchiveVerifier verifier) throws Exception {

spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/junit/runner/classpath/ModifiedClassPathRunner.java

@@ -125,14 +125,10 @@ public class ModifiedClassPathRunner extends BlockJUnit4ClassRunner {
 	}
 
 	private String[] getClassPath(URL booterJar) throws Exception {
-		JarFile jarFile = new JarFile(new File(booterJar.toURI()));
-		try {
+		try (JarFile jarFile = new JarFile(new File(booterJar.toURI()))) {
 			return StringUtils.delimitedListToStringArray(jarFile.getManifest()
 					.getMainAttributes().getValue(Attributes.Name.CLASS_PATH), " ");
 		}
-		finally {
-			jarFile.close();
-		}
 	}
 
 	private URL[] processUrls(URL[] urls, Class<?> testClass) throws Exception {

spring-boot/src/main/java/org/springframework/boot/ApplicationHome.java

@@ -36,6 +36,7 @@ import org.springframework.util.StringUtils;
  * both Jar Files, Exploded Archives and directly running applications.
  *
  * @author Phillip Webb
+ * @author Raja Kolli
  * @since 1.2.0
  */
 public class ApplicationHome {

spring-boot/src/main/java/org/springframework/boot/ApplicationPid.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,13 +81,9 @@ public class ApplicationPid {
 	public void write(File file) throws IOException {
 		Assert.state(this.pid != null, "No PID available");
 		createParentFolder(file);
-		FileWriter writer = new FileWriter(file);
-		try {
+		try (FileWriter writer = new FileWriter(file)) {
 			writer.append(this.pid);
 		}
-		finally {
-			writer.close();
-		}
 	}
 
 	private void createParentFolder(File file) {

spring-boot/src/main/java/org/springframework/boot/ImageBanner.java

@@ -44,6 +44,7 @@ import org.springframework.util.Assert;
  * @author Craig Burke
  * @author Phillip Webb
  * @author Madhura Bhave
+ * @author Raja Kolli
  * @since 1.4.0
  */
 public class ImageBanner implements Banner {

spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/FileSessionPersistence.java

@@ -37,6 +37,7 @@ import org.springframework.core.ConfigurableObjectInputStream;
  *
  * @author Phillip Webb
  * @author Peter Leibiger
+ * @author Raja Kolli
  */
 class FileSessionPersistence implements SessionPersistenceManager {
 
@@ -59,13 +60,10 @@ class FileSessionPersistence implements SessionPersistenceManager {
 
 	private void save(Map<String, PersistentSession> sessionData, File file)
 			throws IOException {
-		ObjectOutputStream stream = new ObjectOutputStream(new FileOutputStream(file));
-		try {
+		try (ObjectOutputStream stream = new ObjectOutputStream(
+				new FileOutputStream(file))) {
 			save(sessionData, stream);
 		}
-		finally {
-			stream.close();
-		}
 	}
 
 	private void save(Map<String, PersistentSession> sessionData,

spring-boot/src/main/java/org/springframework/boot/web/servlet/view/MustacheView.java

@@ -83,13 +83,9 @@ public class MustacheView extends AbstractTemplateView {
 	}
 
 	private Template createTemplate(Resource resource) throws IOException {
-		Reader reader = getReader(resource);
-		try {
+		try (Reader reader = getReader(resource)) {
 			return this.compiler.compile(reader);
 		}
-		finally {
-			reader.close();
-		}
 	}
 
 	private Reader getReader(Resource resource) throws IOException {

spring-boot/src/test/java/org/springframework/boot/context/ConfigurationWarningsApplicationContextInitializerTests.java

@@ -112,18 +112,12 @@ public class ConfigurationWarningsApplicationContextInitializerTests {
 	}
 
 	private void load(Class<?> configClass) {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
-		new TestConfigurationWarningsApplicationContextInitializer().initialize(context);
-		context.register(configClass);
-		try {
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext()) {
+			new TestConfigurationWarningsApplicationContextInitializer()
+					.initialize(context);
+			context.register(configClass);
 			context.refresh();
 		}
-		catch (Exception ex) {
-			ex.printStackTrace();
-		}
-		finally {
-			context.close();
-		}
 	}
 
 	/**

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -196,12 +196,8 @@ public class ConfigFileApplicationListenerTests {
 		try {
 			Properties properties = new Properties();
 			properties.put("the.property", "fromlocalfile");
-			OutputStream out = new FileOutputStream(localFile);
-			try {
-				properties.store(out, "");
-			}
-			finally {
-				out.close();
+			try (OutputStream outputStream = new FileOutputStream(localFile)) {
+				properties.store(outputStream, "");
 			}
 			this.initializer.postProcessEnvironment(this.environment, this.application);
 			String property = this.environment.getProperty("the.property");

spring-boot/src/test/java/org/springframework/boot/context/logging/LoggingApplicationListenerIntegrationTests.java

@@ -44,15 +44,11 @@ public class LoggingApplicationListenerIntegrationTests {
 
 	@Test
 	public void loggingSystemRegisteredInTheContext() {
-		ConfigurableApplicationContext context = new SpringApplicationBuilder(
-				SampleService.class).web(WebApplicationType.NONE).run();
-		try {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
+				SampleService.class).web(WebApplicationType.NONE).run()) {
 			SampleService service = context.getBean(SampleService.class);
 			assertThat(service.loggingSystem).isNotNull();
 		}
-		finally {
-			context.close();
-		}
 	}
 
 	@Test

spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/BeanCreationFailureAnalyzerTests.java

@@ -33,7 +33,7 @@ import static org.junit.Assert.fail;
  *
  * @author Stephane Nicoll
  */
-public class BeanCreationFailureAnalyzerTest {
+public class BeanCreationFailureAnalyzerTests {
 
 	private final FailureAnalyzer analyzer = new BeanCreationFailureAnalyzer();
 
@@ -55,20 +55,14 @@ public class BeanCreationFailureAnalyzerTest {
 	}
 
 	private Exception createFailure(Class<?> configuration) {
-		ConfigurableApplicationContext context = null;
-		try {
-			context = new AnnotationConfigApplicationContext(configuration);
+		try (ConfigurableApplicationContext context = new AnnotationConfigApplicationContext(
+				configuration)) {
+			fail("Expected failure did not occur");
+			return null;
 		}
 		catch (Exception ex) {
 			return ex;
 		}
-		finally {
-			if (context != null) {
-				context.close();
-			}
-		}
-		fail("Expected failure did not occur");
-		return null;
 	}
 
 	@Configuration

spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/BeanCurrentlyInCreationFailureAnalyzerTests.java

@@ -118,9 +118,8 @@ public class BeanCurrentlyInCreationFailureAnalyzerTests {
 
 	private List<String> readDescriptionLines(FailureAnalysis analysis)
 			throws IOException {
-		BufferedReader lineReader = new BufferedReader(
-				new StringReader(analysis.getDescription()));
-		try {
+		try (BufferedReader lineReader = new BufferedReader(
+				new StringReader(analysis.getDescription()))) {
 			List<String> lines = new ArrayList<>();
 			String line;
 			while ((line = lineReader.readLine()) != null) {
@@ -128,9 +127,6 @@ public class BeanCurrentlyInCreationFailureAnalyzerTests {
 			}
 			return lines;
 		}
-		finally {
-			lineReader.close();
-		}
 	}
 
 	private FailureAnalysis performAnalysis(Class<?> configuration) {
@@ -140,21 +136,15 @@ public class BeanCurrentlyInCreationFailureAnalyzerTests {
 	}
 
 	private Exception createFailure(Class<?> configuration) {
-		ConfigurableApplicationContext context = null;
-		try {
-			context = new AnnotationConfigApplicationContext(configuration);
+		try (ConfigurableApplicationContext context = new AnnotationConfigApplicationContext(
+				configuration);) {
+			fail("Expected failure did not occur");
+			return null;
 		}
 		catch (Exception ex) {
 			ex.printStackTrace();
 			return ex;
 		}
-		finally {
-			if (context != null) {
-				context.close();
-			}
-		}
-		fail("Expected failure did not occur");
-		return null;
 	}
 
 	@org.springframework.context.annotation.Configuration

spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/BeanNotOfRequiredTypeFailureAnalyzerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -57,20 +57,14 @@ public class BeanNotOfRequiredTypeFailureAnalyzerTests {
 	}
 
 	private Exception createFailure(Class<?> configuration) {
-		ConfigurableApplicationContext context = null;
-		try {
-			context = new AnnotationConfigApplicationContext(configuration);
+		try (ConfigurableApplicationContext context = new AnnotationConfigApplicationContext(
+				configuration)) {
+			fail("Expected failure did not occur");
+			return null;
 		}
 		catch (Exception ex) {
 			return ex;
 		}
-		finally {
-			if (context != null) {
-				context.close();
-			}
-		}
-		fail("Expected failure did not occur");
-		return null;
 	}
 
 	@Configuration

spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/NoUniqueBeanDefinitionFailureAnalyzerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -102,20 +102,19 @@ public class NoUniqueBeanDefinitionFailureAnalyzerTests {
 	}
 
 	private BeanCreationException createFailure(Class<?> consumer) {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
-		context.register(DuplicateBeansProducer.class, consumer);
-		context.setParent(new AnnotationConfigApplicationContext(ParentProducer.class));
-		try {
-			context.refresh();
+		try (AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext()) {
+			context.register(DuplicateBeansProducer.class, consumer);
+			context.setParent(
+					new AnnotationConfigApplicationContext(ParentProducer.class));
+			try {
+				context.refresh();
+			}
+			catch (BeanCreationException ex) {
+				this.analyzer.setBeanFactory(context.getBeanFactory());
+				return ex;
+			}
 			return null;
 		}
-		catch (BeanCreationException ex) {
-			this.analyzer.setBeanFactory(context.getBeanFactory());
-			return ex;
-		}
-		finally {
-			context.close();
-		}
 	}
 
 	private FailureAnalysis analyzeFailure(BeanCreationException failure) {

spring-boot/src/test/java/org/springframework/boot/web/servlet/context/ServletWebServerMvcIntegrationTests.java

@@ -101,15 +101,11 @@ public class ServletWebServerMvcIntegrationTests {
 		ClientHttpRequest request = clientHttpRequestFactory.createRequest(new URI(
 				"http://localhost:" + context.getWebServer().getPort() + resourcePath),
 				HttpMethod.GET);
-		ClientHttpResponse response = request.execute();
-		try {
+		try (ClientHttpResponse response = request.execute()) {
 			String actual = StreamUtils.copyToString(response.getBody(),
 					Charset.forName("UTF-8"));
 			assertThat(actual).isEqualTo("Hello World");
 		}
-		finally {
-			response.close();
-		}
 	}
 
 	// Simple main method for testing in a browser

spring-boot/src/test/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactoryTests.java

@@ -122,6 +122,7 @@ import static org.mockito.Mockito.verify;
  * @author Phillip Webb
  * @author Greg Turnquist
  * @author Andy Wilkinson
+ * @author Raja Kolli
  */
 public abstract class AbstractServletWebServerFactoryTests {
 
@@ -1058,13 +1059,9 @@ public abstract class AbstractServletWebServerFactoryTests {
 
 	protected String getResponse(String url, HttpMethod method, String... headers)
 			throws IOException, URISyntaxException {
-		ClientHttpResponse response = getClientResponse(url, method, headers);
-		try {
+		try (ClientHttpResponse response = getClientResponse(url, method, headers)) {
 			return StreamUtils.copyToString(response.getBody(), Charset.forName("UTF-8"));
 		}
-		finally {
-			response.close();
-		}
 	}
 
 	protected String getResponse(String url,
@@ -1076,14 +1073,10 @@ public abstract class AbstractServletWebServerFactoryTests {
 	protected String getResponse(String url, HttpMethod method,
 			HttpComponentsClientHttpRequestFactory requestFactory, String... headers)
 					throws IOException, URISyntaxException {
-		ClientHttpResponse response = getClientResponse(url, method, requestFactory,
-				headers);
-		try {
+		try (ClientHttpResponse response = getClientResponse(url, method, requestFactory,
+				headers)) {
 			return StreamUtils.copyToString(response.getBody(), Charset.forName("UTF-8"));
 		}
-		finally {
-			response.close();
-		}
 	}
 
 	protected ClientHttpResponse getClientResponse(String url, String... headers)

spring-boot/src/test/java/org/springframework/boot/web/servlet/support/SpringBootServletInitializerTests.java

@@ -102,15 +102,11 @@ public class SpringBootServletInitializerTests {
 					@Override
 					public void onStartup(ServletContext servletContext)
 							throws ServletException {
-						AbstractApplicationContext context = (AbstractApplicationContext) new WithErrorPageFilterNotRegistered()
-								.createRootApplicationContext(servletContext);
-						try {
+						try (AbstractApplicationContext context = (AbstractApplicationContext) new WithErrorPageFilterNotRegistered()
+								.createRootApplicationContext(servletContext)) {
 							assertThat(context.getBeansOfType(ErrorPageFilter.class))
 									.hasSize(0);
 						}
-						finally {
-							context.close();
-						}
 					}
 				});
 		try {
@@ -124,14 +120,10 @@ public class SpringBootServletInitializerTests {
 	@Test
 	public void executableWarThatUsesServletInitializerDoesNotHaveErrorPageFilterConfigured()
 			throws Exception {
-		ConfigurableApplicationContext context = new SpringApplication(
-				ExecutableWar.class).run();
-		try {
+		try (ConfigurableApplicationContext context = new SpringApplication(
+				ExecutableWar.class).run()) {
 			assertThat(context.getBeansOfType(ErrorPageFilter.class)).hasSize(0);
 		}
-		finally {
-			context.close();
-		}
 	}
 
 	@Test