MDL-67284 mod_feedback: Add missing file phpdoc block

mod/feedback/db/upgrade.php

@@ -14,25 +14,30 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-// This file keeps track of upgrades to
-// the feedback module
-//
-// Sometimes, changes between versions involve
-// alterations to database structures and other
-// major things that may break installations.
-//
-// The upgrade function in this file will attempt
-// to perform all the necessary actions to upgrade
-// your older installation to the current version.
-//
-// If there's something it cannot do itself, it
-// will tell you what you need to do.
-//
-// The commands in here will all be database-neutral,
-// using the methods of database_manager class
-//
-// Please do not forget to use upgrade_set_timeout()
-// before any action that may take longer time to finish.
+/**
+ * This file keeps track of upgrades to the feedback module.
+ *
+ * Sometimes, changes between versions involve
+ * alterations to database structures and other
+ * major things that may break installations.
+ *
+ * The upgrade function in this file will attempt
+ * to perform all the necessary actions to upgrade
+ * your older installation to the current version.
+ *
+ * If there's something it cannot do itself, it
+ * will tell you what you need to do.
+ *
+ * The commands in here will all be database-neutral,
+ * using the methods of database_manager class
+ *
+ * Please do not forget to use upgrade_set_timeout()
+ * before any action that may take longer time to finish.
+ *
+ * @package   mod_feedback
+ * @copyright Andreas Grabs
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 
 defined('MOODLE_INTERNAL') || die();