code cleanup

Author: thurka

visualvm/heapviewer.truffle/src/org/graalvm/visualvm/heapviewer/truffle/TruffleObject.java

@@ -35,7 +35,7 @@
  */
 public abstract class TruffleObject {
 
-    public static final DataType<TruffleObject> DATA_TYPE = new DataType<TruffleObject>(TruffleObject.class, null, null);
+    public static final DataType<TruffleObject> DATA_TYPE = new DataType<>(TruffleObject.class, null, null);
 
 
     public abstract long getSize();

visualvm/heapviewer.truffle/src/org/graalvm/visualvm/heapviewer/truffle/TruffleObjectsWrapper.java

@@ -33,7 +33,7 @@
  */
 public abstract class TruffleObjectsWrapper<O extends TruffleObject> {
 
-    public static final DataType<TruffleObjectsWrapper> DATA_TYPE = new DataType<TruffleObjectsWrapper>(TruffleObjectsWrapper.class, null, null);
+    public static final DataType<TruffleObjectsWrapper> DATA_TYPE = new DataType<>(TruffleObjectsWrapper.class, null, null);
 
 
     public abstract String getType();

visualvm/heapviewer.truffle/src/org/graalvm/visualvm/heapviewer/truffle/TruffleType.java

@@ -40,7 +40,7 @@
  */
 public abstract class TruffleType<O extends TruffleObject> {
 
-    public static final DataType<String> TYPE_NAME = new DataType<String>(String.class, null, null);
+    public static final DataType<String> TYPE_NAME = new DataType<>(String.class, null, null);
 
     private final String name;