minor code style issues in the query validator

Author: gavinking

tooling/metamodel-generator/src/main/java/org/hibernate/processor/validation/MockEntityPersister.java

@@ -149,7 +149,7 @@ public MockEntityPersister getRootEntityPersister() {
 
 	@Override
 	public Set<String> getSubclassEntityNames() {
-		Set<String> names = new HashSet<>();
+		final Set<String> names = new HashSet<>();
 		names.add( entityName );
 		for (MockEntityPersister persister : factory.getMockEntityPersisters()) {
 			if (persister.isSubclassPersister(this)) {