Add Static to final class definitions

Author: cppwfs

spring-cloud-task-batch/src/test/java/org/springframework/cloud/task/batch/handler/TaskJobLauncherApplicationRunnerTests.java

@@ -180,7 +180,7 @@ private void validateForFail(String errorMessage, Class<?> clazz, String[] enabl
 	}
 
 	@Component
-	private static class JobExecutionEventListener implements ApplicationListener<JobExecutionEvent> {
+	private static final class JobExecutionEventListener implements ApplicationListener<JobExecutionEvent> {
 
 		private int eventCounter = 0;
 

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/listener/TaskListenerExecutorObjectFactory.java

@@ -152,7 +152,7 @@ private void processBean(String beanName, final Class<?> type) {
 		}
 	}
 
-	private static class MethodGetter<T extends Annotation> {
+	private static final class MethodGetter<T extends Annotation> {
 
 		public Map<Method, T> getMethods(final Class<?> type, final Class<T> annotationClass) {
 			return MethodIntrospector.selectMethods(type,

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/repository/dao/MapTaskExecutionDao.java

@@ -339,7 +339,7 @@ else if (taskExecutions.size() == 1) {
 		}
 	}
 
-	private static class TaskExecutionComparator implements Comparator<TaskExecution>, Serializable {
+	private static final class TaskExecutionComparator implements Comparator<TaskExecution>, Serializable {
 
 		@Override
 		public int compare(TaskExecution firstTaskExecution, TaskExecution secondTaskExecution) {

spring-cloud-task-core/src/test/java/org/springframework/cloud/task/listener/TaskLifecycleListenerTests.java

@@ -337,7 +337,7 @@ public List<String> getNonOptionArgs() {
 
 	}
 
-	private static class TestListener2 extends TestListener {
+	private static final class TestListener2 extends TestListener {
 
 	}