PHP 7.0 compatibility

The PHP compatibility checker plugin reports this incompatibilities:

FILE: /…/wp-content/plugins/rocket-maintenance-mode/views/index.php
———————————————————————————-FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
———————————————————————————- 1 | WARNING | No PHP code was found in this file and short open tags are not allowed by this install of PHP. This file may be using short open tags but PHP does not allow them.
———————————————————————————-

FILE: /…/wp-content/plugins/rocket-maintenance-mode/includes/index.php
———————————————————————————-FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
———————————————————————————- 1 | WARNING | No PHP code was found in this file and short open tags are not allowed by this install of PHP. This file may be using short open tags but PHP does not allow them.
———————————————————————————-
FILE: /…/wp-content/plugins/rocket-maintenance-mode/includes/libs/MCAPI.class.php
———————————————————————————-FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
———————————————————————————- 39 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
2884 | WARNING | INI directive ‘magic_quotes_runtime’ is deprecated since PHP 5.3 and removed since PHP 5.4
———————————————————————————-

FILE: /…/wp-content/plugins/rocket-maintenance-mode/css/index.php
———————————————————————————-FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
———————————————————————————- 1 | WARNING | No PHP code was found in this file and short open tags are not allowed by this install of PHP. This file may be using short open tags but PHP does not allow them.
———————————————————————————-
FILE: /…/wp-content/plugins/rocket-maintenance-mode/images/index.php
———————————————————————————-FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
———————————————————————————-
1 | WARNING | No PHP code was found in this file and short open tags are not allowed by this install of PHP. This file may be using short open tags but PHP does not allow them.
———————————————————————————-