diff --git a/main/admin/user_list.php b/main/admin/user_list.php
index 63367fab70..1d2a7f3cd5 100755
--- a/main/admin/user_list.php
+++ b/main/admin/user_list.php
@@ -688,8 +688,8 @@ if (!empty($action)) {
 					$number_of_deleted_users = 0;
 					if (is_array($_POST['id'])) {
 						foreach ($_POST['id'] as $index => $user_id) {
-							if($user_id != $_user['user_id']) {
-								if(UserManager :: delete_user($user_id)) {
+							if ($user_id != $_user['user_id']) {
+								if (UserManager::delete_user($user_id)) {
 									$number_of_deleted_users++;
 								}
 							}
diff --git a/main/inc/lib/usermanager.lib.php b/main/inc/lib/usermanager.lib.php
index 41a38fe251..09c47e7907 100755
--- a/main/inc/lib/usermanager.lib.php
+++ b/main/inc/lib/usermanager.lib.php
@@ -459,6 +459,7 @@ class UserManager
             ));
             $hook->notifyCreateUser(HOOK_EVENT_TYPE_POST);
         }
+
         return $return;
     }
 
@@ -649,9 +650,6 @@ class UserManager
                 WHERE lastedit_user_id = '".$user_id."'";
         Database::query($sql);
 
-
-
-
         // Delete user from database
         $sql = "DELETE FROM $table_user WHERE id = '".$user_id."'";
         Database::query($sql);
@@ -690,7 +688,7 @@ class UserManager
      * @assert (-1) === false
      * @assert (array(-1)) === false
      */
-    static function delete_users($ids = array())
+    public static function delete_users($ids = array())
     {
         $result = false;
         $ids = is_array($ids) ? $ids : func_get_args();
@@ -715,7 +713,7 @@ class UserManager
      * @assert (null) === false
      * @assert (array(-1)) === false
      */
-    static function deactivate_users($ids = array())
+    public static function deactivate_users($ids = array())
     {
         if (empty($ids)) {
             return false;
@@ -745,7 +743,7 @@ class UserManager
      * @assert (null) === false
      * @assert (array(-1)) === false
      */
-    static function activate_users($ids = array())
+    public static function activate_users($ids = array())
     {
         if (empty($ids)) {
             return false;
@@ -1271,6 +1269,7 @@ class UserManager
         while ($row = Database::fetch_array($rs)) {
             $result[] = $row;
         }
+
         return $result;
     }
 
@@ -1282,8 +1281,12 @@ class UserManager
      * @todo optional course code parameter, optional sorting parameters...
      * @todo security filter order by
      */
-    public static function get_user_list($conditions = array(), $order_by = array(), $limit_from = false, $limit_to = false)
-    {
+    public static function get_user_list(
+        $conditions = array(),
+        $order_by = array(),
+        $limit_from = false,
+        $limit_to = false
+    ) {
         $user_table = Database :: get_main_table(TABLE_MAIN_USER);
         $return_array = array();
         $sql_query = "SELECT * FROM $user_table";
@@ -1319,8 +1322,12 @@ class UserManager
      * @todo optional course code parameter, optional sorting parameters...
      * @todo security filter order_by
      */
-    public static function get_user_list_like($conditions = array(), $order_by = array(), $simple_like = false, $condition = 'AND')
-    {
+    public static function get_user_list_like(
+        $conditions = array(),
+        $order_by = array(),
+        $simple_like = false,
+        $condition = 'AND'
+    ) {
         $user_table = Database :: get_main_table(TABLE_MAIN_USER);
         $return_array = array();
         $sql_query = "SELECT * FROM $user_table";
@@ -1442,7 +1449,7 @@ class UserManager
                 try {
                     mkdir($rootPath, $perm);
                 } catch (Exception $e) {
-                    //
+                    error_log($e->getMessage());
                 }
             }
         }
@@ -1511,7 +1518,6 @@ class UserManager
         }
 
         $gravatarEnabled = api_get_setting('gravatar_enabled');
-
         $anonymousPath = Display::returnIconPath('unknown.png', $pictureAnonymousSize);
 
         if ($pictureWebFile == 'unknown.jpg' || empty($pictureWebFile)) {
@@ -1804,8 +1810,8 @@ class UserManager
     /**
      * Remove a user production.
      *
-     * @param   int $user_id        User id
-     * @param   string $production    The production to remove
+     * @param int $user_id        User id
+     * @param string $production    The production to remove
      */
     public static function remove_user_production($user_id, $production)
     {
@@ -2053,6 +2059,7 @@ class UserManager
     {
         $extraField = new ExtraField('user');
         $data = $extraField->get_handler_field_info_by_field_variable($variable);
+
         return empty($data) ? true : false;
     }