code: public boolean containsMimeTypeForFilename (@Nonnull @Nonempty final String sFilename)
    {
      ValueEnforcer.notEmpty (sFilename, "Filename");
  
      final String sExtension = FilenameHelper.getExtension (sFilename);
      return containsMimeTypeForExtension (sExtension);
    }
docs: Check if any mime type is registered for the extension of the specified
  filename.
  
  @param sFilename
  The filename to search. May neither be <code>null</code> nor empty.
  @return <code>true</code> if at least one mime type is associated with the
  extension of the passed filename, <code>false</code> otherwise.