code: @Override
      public boolean registerFileExtension(String fileTypeName, String fileTypeExtension, String application) throws OSException {
          throw new UnsupportedOperationException("Not supported yet.");
      }
docs: Registers a new file extension in the operating system.
  
  @param fileTypeName Name of the file extension. Must be atomic, e.g.
  <code>foocorp.fooapp.v1</code>.
  @param fileTypeExtension File extension with leading dot, e.g.
  <code>.bar</code>.
  @param application Path to the application, which should open the new
  file extension.
  @return <code>true</code> if registration was successful,
  <code>false</code> otherwise.
  @throws OSException