title: ProGuard - unexpectedly contains class
body: <p>While I'm trying to obfuscate simple DataLoader.class file in ProGuard I get this error:</p>
  
  <pre><code>Reading program directory [C:\Users\uzytkownik\Documents\NetBeansProjects\ProTest\build\classes\Files\DataLoader.class]
  Warning: class [DataLoader.class] unexpectedly contains class [Files.DataLoader]
  Warning: there were 1 classes in incorrectly named files.
           You should make sure all file names correspond to their class names.
           The directory hierarchies must correspond to the package hierarchies.
           (http://proguard.sourceforge.net/manual/troubleshooting.html#unexpectedclass)
           If you don't mind the mentioned classes not being written out,
           you could try your luck using the '-ignorewarnings' option.
  Please correct the above warnings first.
  </code></pre>
  
  <p>Here is the project:
  <a href="http://www49.zippyshare.com/v/14668241/file.html" rel="noreferrer">http://www49.zippyshare.com/v/14668241/file.html</a></p>
  
  <p>I will be grateful for your help.</p>