public function addTranslation(TranslationGroup $translationGroup, $locale, $text, $filename)
    {
        $translation = new \Kunstmaan\TranslatorBundle\Entity\Translation();
        $translation->setLocale($locale);
        $translation->setText($text);
        $translation->setDomain($translationGroup->getDomain());
        $translation->setFile($filename);
        $translation->setKeyword($translationGroup->getKeyword());
        $translation->setCreatedAt(new \DateTime());
        $translation->setUpdatedAt(new \DateTime());
        $translation->setTranslationId($translationGroup->getId());

        $this->translationRepository->persist($translation);
        $this->dbCopy[] = $translation;
    }