modify adapter

packages/adapter/index.js

@@ -1,57 +1,19 @@
 'use strict';
-const util         = require('util');
 const EventEmitter = require('events');
 
-/**
- * [Adapter description]
- */
-function Adapter(){
-  EventEmitter.call(this);
-  return this;
+class NotImplementedException extends Error {
+  // Nothing.
 }
 
-util.inherits(Adapter, EventEmitter);
-
-/**
- * [extends description]
- * @param  {[type]} ctor [description]
- * @return {[type]}      [description]
- */
-Adapter.extends = function(ctor){
-  // console.log(ctor);
-  util.inherits(ctor, Adapter);
-  return ctor;
-};
-
-/**
- * [open description]
- * @return {[type]} [description]
- */
-Adapter.prototype.open = function () {
-  throw new Error('NotImplementedException');
-  return this;
-};
-
-/**
- * [close description]
- * @return {[type]} [description]
- */
-Adapter.prototype.close = function () {
-  throw new Error('NotImplementedException');
-  return this;
-};
-
-/**
- * [write description]
- * @return {[type]} [description]
- */
-Adapter.prototype.write = function () {
-  throw new Error('NotImplementedException');
-  return this;
-};
-
-/**
- * [exports description]
- * @type {[type]}
- */
-module.exports = Adapter;
+class Adapter extends EventEmitter {
+  open() {
+    throw new NotImplementedException();
+  }
+  write() {
+    throw new NotImplementedException();
+  }
+  close() {
+    throw new NotImplementedException();
+  }
+}
+module.exports = Adapter;