Minor refactors

Author: drpayyne

src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/rule/BoxNotEmptyRule.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
 package com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule;
 
 public class BoxNotEmptyRule implements ValidationRule {
@@ -12,4 +17,4 @@ public boolean check(final String value) {
     public static ValidationRule getInstance() {
         return INSTANCE;
     }
-}
+}

src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/rule/ConfigPathRule.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
 package com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule;
 
 import com.magento.idea.magento2plugin.util.RegExUtil;

src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/rule/CronScheduleRule.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
 package com.magento.idea.magento2plugin.actions.generation.dialog.validator.rule;
 
 import com.magento.idea.magento2plugin.util.RegExUtil;