@@ -0,0 +1,486 @@
+package org.sipc.se.plugin;%0A%0Aimport javax.servlet.http.HttpServletRequest;%0Aimport javax.servlet.http.HttpServletResponse;%0A%0Apublic abstract class PluginImpl implements Plugin , Comparable%3CPluginImpl%3E %7B%0A%0A%09public abstract String getUrl() ; %0A%09%0A%09public abstract boolean onEnable() ; %0A%0A%09public abstract void getResponse(HttpServletRequest request,%0A%09%09%09HttpServletResponse response) ;%0A%0A%09@Override%0A%09public int compareTo(PluginImpl o) %7B%0A%09%09%0A%09%09return this.getUrl().compareTo(o.getUrl());%0A%09%09%0A%09%7D%0A%09%0A%7D%0A

Add abstract class PluginImpl , is a implement class of Plugin