diff --git a/dta.zip b/dta.zip
index c4aeafad02cc5f5c807c2b7c264f98588c25e477..8e1804094b0480d23171076450aa15013eda0460 100644
Binary files a/dta.zip and b/dta.zip differ
diff --git a/dta/classes/privacy/provider.php b/dta/classes/privacy/provider.php
index 6ad71ed5787772be714ba3373e13ec416868e1a5..d67682710b449c466d30c544b5178660d9d0df12 100644
--- a/dta/classes/privacy/provider.php
+++ b/dta/classes/privacy/provider.php
@@ -14,13 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * provider for data privacy
- *
- * @package assignsubmission_dta
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- * @copyright Gero Lueckemeyer and student project teams
- */
 namespace assignsubmission_dta\privacy;
 
 use core_privacy\local\metadata\collection;
@@ -44,7 +37,11 @@ class provider implements \core_privacy\local\metadata\provider,
      */
     const ASSIGNSUBMISSION_DTA_FILEAREA_SUBMISSION = "submissions_dta";
 
-    public static function get_metadata(collection $collection): collection {
+    /**
+     * This is the metadata information for the assignsubmission_dta plugin.
+     * @param stdClass $collection the collection of metadata filled by the plugin
+     */
+    public static function get_metadata(stdClass $collection): collection {
         $collection->add_subsystem_link(
             'core_files',
             [],
diff --git a/dta/models/DtaResult.php b/dta/models/DtaResult.php
index a06e33d2976082a5c7c3280d70fa67a020761842..592d6f0633bfeec9bdb4024e2d0b845be4ab5f94 100644
--- a/dta/models/DtaResult.php
+++ b/dta/models/DtaResult.php
@@ -92,8 +92,8 @@ class DtaResult {
 
     /**
      * Returns the name of a state with the given number of display.
-     * @param $state number of the state
-     * @return name of state as defined
+     * @param int $state number of the state
+     * @return string name of state as defined
      */
     public static function getstatename(int $state): string {
         if ($state == 1) {
@@ -188,7 +188,6 @@ class DtaResultSummary {
         return $ret;
     }
 
-
     /**
      * Returns the number of detail results attached to the summary.
      * @return int count of occurences
diff --git a/dta/utils/database.php b/dta/utils/database.php
index d171813d39316992b8d7b33acb55db1f29b1dfe8..e9aae8333e9ff38d0234787c84942f2cb8d76cd8 100644
--- a/dta/utils/database.php
+++ b/dta/utils/database.php
@@ -14,6 +14,14 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+/**
+ * persistence layer utility class
+ *
+ * @package assignsubmission_dta
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @copyright Gero Lueckemeyer and student project teams
+ */
+
 /**
  * persistence layer utility class
  *