增加EventException作为事件中异常机制

Westdc/EventModel/EventException.php

@@ -0,0 +1,14 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: liujin834
+ * Date: 15-2-8
+ * Time: 上午9:46
+ */
+
+namespace Westdc\EventModel;
+
+
+class EventException extends \Exception{
+
+}