protected function saveChecksum($dumpChecksum)
    {
        $dumpName = $this->getDumpName();
        $dumpDirectory = $this->getDumpDirectory();
        $allChecksum = $this->getChecksum();
        $allChecksum[$dumpName] = $dumpChecksum;
        $this->checksum = $allChecksum;

        file_put_contents($dumpDirectory.'/checksums.txt', serialize($allChecksum));
    }