Polish caught exception names

Prefer `ex` over `e`.

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/cloudfoundry/CloudFoundrySecurityService.java

@@ -109,7 +109,7 @@ class CloudFoundrySecurityService {
 			return extractTokenKeys(this.restTemplate
 					.getForObject(getUaaUrl() + "/token_keys", Map.class));
 		}
-		catch (HttpStatusCodeException e) {
+		catch (HttpStatusCodeException ex) {
 			throw new CloudFoundryAuthorizationException(Reason.SERVICE_UNAVAILABLE,
 					"UAA not reachable");
 		}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/statsd/StatsdMetricWriterTests.java

@@ -151,7 +151,7 @@ public class StatsdMetricWriterTests {
 				try {
 					Thread.sleep(50L);
 				}
-				catch (InterruptedException e) {
+				catch (InterruptedException ex) {
 					Thread.currentThread().interrupt();
 				}
 			}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnBeanCondition.java

@@ -205,7 +205,7 @@ class OnBeanCondition extends SpringBootCondition implements ConfigurationCondit
 			collectBeanNamesForAnnotation(names, beanFactory, annotationType,
 					considerHierarchy);
 		}
-		catch (ClassNotFoundException e) {
+		catch (ClassNotFoundException ex) {
 			// Continue
 		}
 		return StringUtils.toStringArray(names);

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

@@ -349,10 +349,10 @@ public class ArtemisAutoConfigurationTests {
 									+ "' was not expected but got " + destination);
 						}
 					}
-					catch (JMSException e) {
+					catch (JMSException ex) {
 						if (shouldExist) {
 							throw new IllegalStateException("Destination '" + name
-									+ "' was expected but got " + e.getMessage());
+									+ "' was expected but got " + ex.getMessage());
 						}
 					}
 					return null;

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/orm/jpa/CustomHibernateJpaAutoConfigurationTests.java

@@ -143,7 +143,7 @@ public class CustomHibernateJpaAutoConfigurationTests {
 				given(dataSource.getConnection().getMetaData())
 						.willReturn(mock(DatabaseMetaData.class));
 			}
-			catch (SQLException e) {
+			catch (SQLException ex) {
 				// Do nothing
 			}
 			return dataSource;

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/orm/jpa/JpaPropertiesTests.java

@@ -221,7 +221,7 @@ public class JpaPropertiesTests {
 			given(connection.getMetaData()).willReturn(metadata);
 			given(ds.getConnection()).willReturn(connection);
 		}
-		catch (SQLException e) {
+		catch (SQLException ex) {
 			// Do nothing
 		}
 		return ds;

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

@@ -210,7 +210,7 @@ public class SecurityAutoConfigurationTests {
 			manager.authenticate(new UsernamePasswordAuthenticationToken("foo", "wrong"));
 			fail("Expected BadCredentialsException");
 		}
-		catch (BadCredentialsException e) {
+		catch (BadCredentialsException ex) {
 			// expected
 		}
 		assertThat(listener.event)

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

@@ -359,8 +359,8 @@ class ProjectGenerationRequest {
 
 			return builder.build();
 		}
-		catch (URISyntaxException e) {
-			throw new ReportableException("Invalid service URL (" + e.getMessage() + ")");
+		catch (URISyntaxException ex) {
+			throw new ReportableException("Invalid service URL (" + ex.getMessage() + ")");
 		}
 	}
 

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

@@ -222,8 +222,8 @@ public class DependencyManagementBomTransformation
 				return new UrlModelSource(
 						Grape.getInstance().resolve(null, dependency)[0].toURL());
 			}
-			catch (MalformedURLException e) {
-				throw new UnresolvableModelException(e.getMessage(), groupId, artifactId,
+			catch (MalformedURLException ex) {
+				throw new UnresolvableModelException(ex.getMessage(), groupId, artifactId,
 						version);
 			}
 		}

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

@@ -116,8 +116,8 @@ public class MavenSettingsReader {
 			try {
 				this._cipher = new DefaultPlexusCipher();
 			}
-			catch (PlexusCipherException e) {
-				throw new IllegalStateException(e);
+			catch (PlexusCipherException ex) {
+				throw new IllegalStateException(ex);
 			}
 		}
 

spring-boot-tools/spring-boot-configuration-metadata/src/main/java/org/springframework/boot/configurationmetadata/JsonReader.java

@@ -186,7 +186,7 @@ class JsonReader {
 			try {
 				return Deprecation.Level.valueOf(value.toUpperCase(Locale.ENGLISH));
 			}
-			catch (IllegalArgumentException e) {
+			catch (IllegalArgumentException ex) {
 				// let's use the default
 			}
 		}

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

@@ -84,8 +84,8 @@ public class TestConfigurationMetadataAnnotationProcessor
 			}
 			return this.metadata;
 		}
-		catch (IOException e) {
-			throw new RuntimeException("Failed to read metadata from disk", e);
+		catch (IOException ex) {
+			throw new RuntimeException("Failed to read metadata from disk", ex);
 		}
 	}
 

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

@@ -60,8 +60,8 @@ abstract class JvmUtils {
 			return new File(System.getProperty("java.home")).toURI().toURL()
 					.toExternalForm();
 		}
-		catch (MalformedURLException e) {
-			throw new IllegalStateException("Cannot locate java.home", e);
+		catch (MalformedURLException ex) {
+			throw new IllegalStateException("Cannot locate java.home", ex);
 		}
 	}
 

spring-boot/src/main/java/org/springframework/boot/context/embedded/undertow/UndertowEmbeddedServletContainerFactory.java

@@ -529,8 +529,8 @@ public class UndertowEmbeddedServletContainerFactory
 			root = (root != null ? root : createTempDir("undertow-docbase"));
 			return root.getCanonicalFile();
 		}
-		catch (IOException e) {
-			throw new IllegalStateException("Cannot get canonical document root", e);
+		catch (IOException ex) {
+			throw new IllegalStateException("Cannot get canonical document root", ex);
 		}
 	}
 

spring-boot/src/main/java/org/springframework/boot/jta/narayana/DataSourceXAResourceRecoveryHelper.java

@@ -127,8 +127,8 @@ public class DataSourceXAResourceRecoveryHelper
 		try {
 			this.xaConnection.close();
 		}
-		catch (SQLException e) {
-			logger.warn("Failed to close connection", e);
+		catch (SQLException ex) {
+			logger.warn("Failed to close connection", ex);
 		}
 		finally {
 			this.xaConnection = null;

spring-boot/src/test/java/org/springframework/boot/admin/SpringApplicationAdminMXBeanRegistrarTests.java

@@ -177,8 +177,8 @@ public class SpringApplicationAdminMXBeanRegistrarTests {
 		try {
 			return new ObjectName(jmxName);
 		}
-		catch (MalformedObjectNameException e) {
-			throw new IllegalStateException("Invalid jmx name " + jmxName, e);
+		catch (MalformedObjectNameException ex) {
+			throw new IllegalStateException("Invalid jmx name " + jmxName, ex);
 		}
 	}