title: Auto generate comment when overriding an interface function?
body: <p>I want sth like this</p>
  
  <pre><code>public interface A {
      void doSth(int a); // a in ms 
  }
  </code></pre>
  
  <p>when I override <code>doSth</code>, the comment "a in ms" also appear in the code.</p>
  
  <pre><code>A a = new A() {
      @Override
      public void doSth(int a) { // a in ms
          ...
      }
  };
  </code></pre>