title: Disallow Multi-Line Commenting via Checkstyle
body: <p>Wondering if there is a particular rule or property that would make Checkstyle (release 6.5+) error out in the presence of multi-line comments as in:</p>
  
  <pre><code>/*
   a multi-line comment, could Checkstyle detect them?
  */
  public Foo bar() {
      ...
  }
  </code></pre>
  
  <p>I believe having a specific Regex pattern rule could be an option but curious about if Checkstyle has already had a dedicated rule/property that could do the trick. </p>