diff --git a/components/AbstractItemEvent.php b/components/AbstractItemEvent.php
new file mode 100644
index 00000000..d5afecf1
--- /dev/null
+++ b/components/AbstractItemEvent.php
@@ -0,0 +1,11 @@
+<?php
+namespace webvimark\modules\UserManagement\components;
+
+use yii\base\Event;
+
+class AbstractItemEvent extends Event
+{
+    public $parentName;
+    public $childrenNames;
+    public $throwException = false;
+}
diff --git a/migrations/m140608_173539_create_user_table.php b/migrations/m140608_173539_create_user_table.php
old mode 100755
new mode 100644
diff --git a/migrations/m140808_073114_create_auth_item_group_table.php b/migrations/m140808_073114_create_auth_item_group_table.php
old mode 100755
new mode 100644
diff --git a/migrations/m140809_072112_insert_superadmin_to_user.php b/migrations/m140809_072112_insert_superadmin_to_user.php
old mode 100755
new mode 100644
diff --git a/migrations/m140809_073114_insert_common_permisison_to_auth_item.php b/migrations/m140809_073114_insert_common_permisison_to_auth_item.php
old mode 100755
new mode 100644
diff --git a/migrations/m141023_141535_create_user_visit_log.php b/migrations/m141023_141535_create_user_visit_log.php
old mode 100755
new mode 100644
diff --git a/migrations/m141116_115804_add_bind_to_ip_and_registration_ip_to_user.php b/migrations/m141116_115804_add_bind_to_ip_and_registration_ip_to_user.php
old mode 100755
new mode 100644
diff --git a/migrations/m141121_194858_split_browser_and_os_column.php b/migrations/m141121_194858_split_browser_and_os_column.php
old mode 100755
new mode 100644
diff --git a/migrations/m141201_220516_add_email_and_email_confirmed_to_user.php b/migrations/m141201_220516_add_email_and_email_confirmed_to_user.php
old mode 100755
new mode 100644
diff --git a/migrations/m141207_001649_create_basic_user_permissions.php b/migrations/m141207_001649_create_basic_user_permissions.php
old mode 100755
new mode 100644
diff --git a/models/rbacDB/AbstractItem.php b/models/rbacDB/AbstractItem.php
index 17892ca5..15c02adb 100644
--- a/models/rbacDB/AbstractItem.php
+++ b/models/rbacDB/AbstractItem.php
@@ -2,11 +2,14 @@
 namespace webvimark\modules\UserManagement\models\rbacDB;
 
 use webvimark\modules\UserManagement\components\AuthHelper;
+use webvimark\modules\UserManagement\components\AbstractItemEvent;
 use webvimark\modules\UserManagement\UserManagementModule;
+use Yii;
+use yii\base\Event;
+use yii\base\ModelEvent;
 use yii\behaviors\TimestampBehavior;
 use yii\db\ActiveQuery;
 use yii\db\ActiveRecord;
-use Yii;
 use yii\helpers\Inflector;
 use yii\rbac\DbManager;
 
@@ -25,6 +28,9 @@
  */
 abstract class AbstractItem extends ActiveRecord
 {
+	const EVENT_BEFORE_ADD_CHILDREN = 'beforeAddChildren';
+	const EVENT_BEFORE_REMOVE_CHILDREN = 'beforeRemoveChildren';
+
 	const TYPE_ROLE = 1;
 	const TYPE_PERMISSION = 2;
 	const TYPE_ROUTE = 3;
@@ -81,6 +87,7 @@ public static function addChildren($parentName, $childrenNames, $throwException
 
 		$dbManager = new DbManager();
 
+		static::beforeAddChildren($parentName, $childrenNames, $throwException = false);
 		foreach ($childrenNames as $childName)
 		{
 			$child = (object)['name'=>$childName];
@@ -109,6 +116,7 @@ public static function removeChildren($parentName, $childrenNames)
 	{
 		$childrenNames = (array) $childrenNames;
 
+		static::beforeRemoveChildren($parentName, $childrenNames);
 		foreach ($childrenNames as $childName)
 		{
 			Yii::$app->db->createCommand()
@@ -247,4 +255,16 @@ public function afterDelete()
 
 		AuthHelper::invalidatePermissions();
 	}
+
+	public function beforeAddChildren($parentName, $childrenNames, $throwException = false)
+	{
+		$event = new AbstractItemEvent(compact('parentName', 'childrenNames', 'throwException'));
+		$event->trigger(get_called_class(), self::EVENT_BEFORE_ADD_CHILDREN, $event);
+	}
+
+	public function beforeRemoveChildren($parentName, $childrenNames)
+	{
+		$event = new AbstractItemEvent(compact('parentName', 'childrenNames', 'throwException'));
+		$event->trigger(get_called_class(), self::EVENT_BEFORE_REMOVE_CHILDREN, $event);
+	}
 } 
\ No newline at end of file