diff --git a/protected/humhub/modules/user/components/PermissionManager.php b/protected/humhub/modules/user/components/PermissionManager.php
index f99a4a8bd7..d582a0c06e 100644
--- a/protected/humhub/modules/user/components/PermissionManager.php
+++ b/protected/humhub/modules/user/components/PermissionManager.php
@@ -22,31 +22,31 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * User identity.
-     * @var \humhub\modules\user\models\User 
+     * @var \humhub\modules\user\models\User
      */
     public $subject;
 
     /**
      * Cached Permission array.
-     * @var array 
+     * @var array
      */
     protected $permissions = null;
 
     /**
      * Permission access cache.
-     * @var array 
+     * @var array
      */
     protected $_access = [];
 
     /**
      * Verifies a given $permission or $permission array for a permission subject.
-     * 
+     *
      * If $params['all'] is set to true and a $permission array is given all given permissions
      * have to be verified successfully otherwise (default) only one permission test has to pass.
-     * 
-     * @param type $permission
-     * @param type $params
-     * @param type $allowCaching
+     *
+     * @param array|BasePermission|mixed $permission
+     * @param array $params
+     * @param boolean $allowCaching
      * @return boolean
      */
     public function can($permission, $params = [], $allowCaching = true)
@@ -77,7 +77,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Verifies a single permission for a given permission subject.
-     * 
+     *
      * @param BasePermission $permission
      * @return boolean
      */
@@ -93,9 +93,9 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Returns the permission subject identity.
-     * If the permission objects $subject property is not set this method returns the currently 
+     * If the permission objects $subject property is not set this method returns the currently
      * logged in user identity.
-     * 
+     *
      * @return \humhub\modules\user\models\User
      */
     protected function getSubject()
@@ -113,7 +113,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Sets the state for a given groupId.
-     * 
+     *
      * @param string $groupId
      * @param BasePermission $permission
      * @param string $state
@@ -146,7 +146,7 @@ class PermissionManager extends \yii\base\Component
      * Returns the group permission state of the given group or goups.
      * If the provided $group is an array we check if one of the group states
      * is a BasePermission::STATE_ALLOW and return this state.
-     * 
+     *
      * @param type $groups either an array of groups or group ids or an single group or goup id
      * @param BasePermission $permission
      * @param type $returnDefaultState
@@ -169,7 +169,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Returns the group state
-     * 
+     *
      * @param string $groupId
      * @param BasePermission $permission
      * @param boolean $returnDefaultState
@@ -197,7 +197,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Returns a BasePermission by Id
-     * 
+     *
      * @param string $permissionId
      * @param string $moduleId
      * @return BasePermission
@@ -226,7 +226,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Returns a list of all Permission objects
-     * 
+     *
      * @return array of BasePermissions
      */
     public function getPermissions()
@@ -250,7 +250,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Returns permissions provided by a module
-     * 
+     *
      * @param \yii\base\Module $module
      * @return array of BasePermissions
      */
@@ -265,7 +265,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Creates a Permission Database record
-     * 
+     *
      * @return Permission
      */
     protected function createPermissionRecord()
@@ -275,7 +275,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Creates a Permission Database Query
-     * 
+     *
      * @return \yii\db\ActiveQuery
      */
     protected function getQuery()
@@ -285,7 +285,7 @@ class PermissionManager extends \yii\base\Component
 
     /**
      * Returns Permission Array
-     * 
+     *
      * @param int $groupId id of the group
      * @return array the permission array
      */