Java 11 migrate c-d (remaining) (#1111)

* Moves converter pattern to Java 11

* Moves cqrs pattern to Java 11

* Moves dao pattern to Java 11

* Moves data-bus pattern to Java 11

* Moves data-locality pattern to Java 11

* Moves data-mapper pattern to Java 11

* Moves data-transfer-object pattern to Java 11

* Moves decorator pattern to Java 11

* Moves delegation pattern to Java 11

* Moves dependency-injection to Java 11

* Moves dirty-flag to Java 11

* Moves double-buffer to Java 11

* Moves double-checked-locking to Java 11

* Moves double-dispatch to Java 11

* Corrects with changes thats breaking test cases

data-bus/src/test/java/com/iluwatar/databus/DataBusTest.java

@@ -23,14 +23,14 @@
 
 package com.iluwatar.databus;
 
+import static org.mockito.BDDMockito.then;
+import static org.mockito.Mockito.never;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import static org.mockito.BDDMockito.then;
-import static org.mockito.Mockito.never;
-
 /**
  * Tests for {@link DataBus}.
  *
@@ -52,7 +52,7 @@ public class DataBusTest {
   @Test
   public void publishedEventIsReceivedBySubscribedMember() {
     //given
-    final DataBus dataBus = DataBus.getInstance();
+    final var dataBus = DataBus.getInstance();
     dataBus.subscribe(member);
     //when
     dataBus.publish(event);
@@ -63,7 +63,7 @@ public class DataBusTest {
   @Test
   public void publishedEventIsNotReceivedByMemberAfterUnsubscribing() {
     //given
-    final DataBus dataBus = DataBus.getInstance();
+    final var dataBus = DataBus.getInstance();
     dataBus.subscribe(member);
     dataBus.unsubscribe(member);
     //when