Consistent abstract declaration for utility classes (plus polishing)

Issue: SPR-16968

spring-context/src/main/java/org/springframework/cache/config/CacheManagementConfigUtils.java

@@ -22,7 +22,7 @@ package org.springframework.cache.config;
  * @author Juergen Hoeller
  * @since 4.1
  */
-public final class CacheManagementConfigUtils {
+public abstract class CacheManagementConfigUtils {
 
 	/**
 	 * The name of the cache advisor bean.
@@ -48,8 +48,4 @@ public final class CacheManagementConfigUtils {
 	public static final String JCACHE_ASPECT_BEAN_NAME =
 			"org.springframework.cache.config.internalJCacheAspect";
 
-
-	private CacheManagementConfigUtils() {
-	}
-
 }

spring-context/src/main/java/org/springframework/context/annotation/BeanAnnotationHelper.java

@@ -29,7 +29,6 @@ import org.springframework.core.annotation.AnnotatedElementUtils;
  */
 final class BeanAnnotationHelper {
 
-
 	private BeanAnnotationHelper() {
 	}
 

spring-context/src/main/java/org/springframework/context/annotation/ScopedProxyCreator.java

@@ -30,7 +30,6 @@ import org.springframework.beans.factory.support.BeanDefinitionRegistry;
  */
 final class ScopedProxyCreator {
 
-
 	private ScopedProxyCreator() {
 	}
 

spring-context/src/main/java/org/springframework/context/support/PostProcessorRegistrationDelegate.java

@@ -49,7 +49,6 @@ import org.springframework.lang.Nullable;
  */
 final class PostProcessorRegistrationDelegate {
 
-
 	private PostProcessorRegistrationDelegate() {
 	}
 
@@ -306,7 +305,7 @@ final class PostProcessorRegistrationDelegate {
 	 * BeanPostProcessor instantiation, i.e. when a bean is not eligible for
 	 * getting processed by all BeanPostProcessors.
 	 */
-	private static class BeanPostProcessorChecker implements BeanPostProcessor {
+	private static final class BeanPostProcessorChecker implements BeanPostProcessor {
 
 		private static final Log logger = LogFactory.getLog(BeanPostProcessorChecker.class);
 

spring-context/src/main/java/org/springframework/format/datetime/joda/JodaTimeConverters.java

@@ -46,7 +46,6 @@ import org.springframework.format.datetime.DateFormatterRegistrar;
  */
 final class JodaTimeConverters {
 
-
 	private JodaTimeConverters() {
 	}
 

spring-context/src/main/java/org/springframework/format/datetime/standard/DateTimeConverters.java

@@ -43,7 +43,6 @@ import org.springframework.format.datetime.DateFormatterRegistrar;
  */
 final class DateTimeConverters {
 
-
 	private DateTimeConverters() {
 	}
 

spring-context/src/main/java/org/springframework/jmx/support/ObjectNameManager.java

@@ -30,7 +30,6 @@ import javax.management.ObjectName;
  */
 public final class ObjectNameManager {
 
-
 	private ObjectNameManager() {
 	}
 

spring-context/src/main/java/org/springframework/scheduling/config/TaskManagementConfigUtils.java

@@ -22,7 +22,7 @@ package org.springframework.scheduling.config;
  * @author Juergen Hoeller
  * @since 4.1
  */
-public final class TaskManagementConfigUtils {
+public abstract class TaskManagementConfigUtils {
 
 	/**
 	 * The bean name of the internally managed Scheduled annotation processor.
@@ -42,9 +42,4 @@ public final class TaskManagementConfigUtils {
 	public static final String ASYNC_EXECUTION_ASPECT_BEAN_NAME =
 			"org.springframework.scheduling.config.internalAsyncExecutionAspect";
 
-
-	private TaskManagementConfigUtils() {
-	}
-
-
 }