diff --git a/classes/event/administrator_added.php b/classes/event/administrator_added.php
new file mode 100644
index 0000000..08daafc
--- /dev/null
+++ b/classes/event/administrator_added.php
@@ -0,0 +1,59 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Registration of the system of events.
+ *
+ * @copyright   2018 "Valentin Popov" <info@valentineus.link>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @package     tool_apisiteadmins
+ */
+
+namespace tool_apisiteadmins\event;
+
+defined("MOODLE_INTERNAL") || die();
+
+/**
+ * Defines how to work with events.
+ *
+ * @copyright   2018 "Valentin Popov" <info@valentineus.link>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @package     tool_apisiteadmins
+ */
+class administrator_added extends \core\event\base {
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data["crud"] = "r";
+        $this->data["edulevel"] = self::LEVEL_OTHER;
+        $this->context = \context_system::instance();
+    }
+
+    /**
+     * Return localised event name.
+     */
+    public static function get_name() {
+        return new \lang_string("update", "moodle");
+    }
+
+    /**
+     * Returns description of what happened.
+     */
+    public function get_description() {
+        return "The user '$this->relateduserid' was added to the list of administrators.";
+    }
+}