[feature/system-cron] Add phpDoc documentation for everything else.

PHPBB3-9596

phpBB/includes/cron/task/parametrized.php

@@ -32,6 +32,8 @@ interface phpbb_cron_task_parametrized extends phpbb_cron_task
 	* Returns parameters of this cron task as an array.
 	*
 	* The array must map string keys to string values.
+	*
+	* @return array
 	*/
 	public function get_parameters();
 
@@ -41,6 +43,8 @@ interface phpbb_cron_task_parametrized extends phpbb_cron_task
 	*
 	* $request contains user input and must not be trusted.
 	* Cron task must validate all data before using it.
+	*
+	* @return void
 	*/
 	public function parse_parameters(phpbb_request_interface $request);
 }