public static function open($filename, $mode)
    {
        $ex = null;
        set_error_handler(function () use ($filename, $mode, &$ex) {
            $ex = new \RuntimeException(sprintf(
                'Unable to open %s using mode %s: %s',
                $filename,
                $mode,
                func_get_args()[1]
            ));
        });

        $handle = fopen($filename, $mode);
        restore_error_handler();

        if ($ex) {
            /** @var $ex \RuntimeException */
            throw $ex;
        }

        return $handle;
    }