Add nullability annotations to smoke-test/spring-boot-smoke-test-data-mongo

See gh-46587

smoke-test/spring-boot-smoke-test-data-mongo/src/main/java/smoketest/data/mongo/SampleDocument.java

@@ -16,28 +16,30 @@
 
 package smoketest.data.mongo;
 
+import org.jspecify.annotations.Nullable;
+
 import org.springframework.data.mongodb.core.mapping.Document;
 
 @Document(collection = "exampleDocuments")
 public class SampleDocument {
 
-	private String id;
+	private @Nullable String id;
 
-	private String text;
+	private @Nullable String text;
 
-	public String getId() {
+	public @Nullable String getId() {
 		return this.id;
 	}
 
-	public void setId(String id) {
+	public void setId(@Nullable String id) {
 		this.id = id;
 	}
 
-	public String getText() {
+	public @Nullable String getText() {
 		return this.text;
 	}
 
-	public void setText(String text) {
+	public void setText(@Nullable String text) {
 		this.text = text;
 	}
 

smoke-test/spring-boot-smoke-test-data-mongo/src/main/java/smoketest/data/mongo/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@NullMarked
+package smoketest.data.mongo;
+
+import org.jspecify.annotations.NullMarked;