<?php

namespace Sabre\DAVACL\PrincipalBackend;

/**
 * Abstract Principal Backend
 *
 * Currently this class has no function. It's here for consistency and so we
 * have a non-bc-breaking way to add a default generic implementation to
 * functions we may add in the future.
 *
 * @copyright Copyright (C) 2007-2013 Rooftop Solutions. All rights reserved.
 * @author Evert Pot (http://www.rooftopsolutions.nl/)
 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
 */
abstract class AbstractBackend implements BackendInterface {

}
