restricting visibility of some new classes

Author: erosb

core/src/main/java/org/everit/json/schema/EarlyFailingFailureReporter.java

@@ -1,6 +1,6 @@
 package org.everit.json.schema;
 
-public class EarlyFailingFailureReporter extends ValidationFailureReporter {
+class EarlyFailingFailureReporter extends ValidationFailureReporter {
 
     public EarlyFailingFailureReporter(Schema schema) {
         super(schema);

core/src/main/java/org/everit/json/schema/ObjectSchemaValidatingVisitor.java

@@ -10,7 +10,7 @@
 
 import org.json.JSONObject;
 
-public class ObjectSchemaValidatingVisitor extends Visitor {
+class ObjectSchemaValidatingVisitor extends Visitor {
 
     private final Object subject;