Use Java 7+ diamond operator in compiler modules

compiler/light-classes/src/org/jetbrains/kotlin/asJava/builder/StubClassBuilder.java

@@ -81,7 +81,7 @@ public class StubClassBuilder extends AbstractClassBuilder {
     ) {
         assert v == null : "defineClass() called twice?";
 
-        v = new StubBuildingVisitor<Object>(null, EMPTY_STRATEGY, parent, access, calculateShortName(name));
+        v = new StubBuildingVisitor<>(null, EMPTY_STRATEGY, parent, access, calculateShortName(name));
 
         super.defineClass(origin, version, access, name, signature, superName, interfaces);
 

compiler/light-classes/src/org/jetbrains/kotlin/asJava/finder/JavaElementFinder.java

@@ -85,7 +85,7 @@ public class JavaElementFinder extends PsiElementFinder implements KotlinFinderM
             return PsiClass.EMPTY_ARRAY;
         }
 
-        List<PsiClass> answer = new SmartList<PsiClass>();
+        List<PsiClass> answer = new SmartList<>();
 
         FqName qualifiedName = new FqName(qualifiedNameString);
 
@@ -186,7 +186,7 @@ public class JavaElementFinder extends PsiElementFinder implements KotlinFinderM
     @NotNull
     @Override
     public PsiClass[] getClasses(@NotNull PsiPackage psiPackage, @NotNull GlobalSearchScope scope) {
-        List<PsiClass> answer = new SmartList<PsiClass>();
+        List<PsiClass> answer = new SmartList<>();
         FqName packageFQN = new FqName(psiPackage.getQualifiedName());
 
         answer.addAll(lightClassGenerationSupport.getFacadeClassesInPackage(packageFQN, scope));