Add nullability annotations to smoke-test/spring-boot-smoke-test-quartz

See gh-46587

smoke-test/spring-boot-smoke-test-quartz/src/main/java/smoketest/quartz/SampleJob.java

@@ -16,6 +16,7 @@
 
 package smoketest.quartz;
 
+import org.jspecify.annotations.Nullable;
 import org.quartz.JobExecutionContext;
 import org.quartz.JobExecutionException;
 
@@ -23,10 +24,10 @@ import org.springframework.scheduling.quartz.QuartzJobBean;
 
 public class SampleJob extends QuartzJobBean {
 
-	private String name;
+	private @Nullable String name;
 
 	// Invoked if a Job data map entry with that name
-	public void setName(String name) {
+	public void setName(@Nullable String name) {
 		this.name = name;
 	}
 

smoke-test/spring-boot-smoke-test-quartz/src/main/java/smoketest/quartz/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.quartz;
+
+import org.jspecify.annotations.NullMarked;