Fix CI complaints

db/mobile.php

 <?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/>.
+
+defined('MOODLE_INTERNAL') || die();
+
 $addons = array(
-  "mod_hvp" => array( // Plugin identifier
+    "mod_hvp" => array( // Plugin identifier.
         'handlers' => array( // Different places where the plugin will display content.
             'coursehvp' => array( // Handler unique name (alphanumeric).
-        'delegate'    => 'CoreCourseModuleDelegate', // Delegate (where to display the link to the plugin)
-        'method'      => 'mobile_course_view', // Main function in \mod_certificate\output\mobile
+                'delegate'    => 'CoreCourseModuleDelegate', // Delegate (where to display the link to the plugin).
+                'method'      => 'mobile_course_view', // Main function in \mod_certificate\output\mobile.
                 'displaydata' => array(
                     'icon'  => $CFG->wwwroot . '/mod/hvp/pix/icon.svg',
                     'class' => '',