Add missing `since` tag

diff --git a/wcfsetup/install/files/lib/system/event/listener/AbstractEventListener.class.php b/wcfsetup/install/files/lib/system/event/listener/AbstractEventListener.class.php
index b403b2d34ce59d2fd09d69b3832f7665cdbbba4f..1793b3a1d66db06185c41ba341ca0bf5de90f400 100644 (file)
--- a/wcfsetup/install/files/lib/system/event/listener/AbstractEventListener.class.php
+++ b/wcfsetup/install/files/lib/system/event/listener/AbstractEventListener.class.php
@@ -23,6 +23,7 @@ use wcf\data\AbstractDatabaseObjectAction;
  * @copyright   2001-2020 WoltLab GmbH
  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @package     WoltLabSuite\Core\System\Event\Listener
+ * @since       5.3
  */
 abstract class AbstractEventListener implements IParameterizedEventListener {
        /**