private static String TranslateEnumToContentType(ContentType contentType){
		switch(contentType){
		case RDF:
			return "application/rdf+xml";
		case TURTLE:
			return "application/x-turtle";
		case NT:
			return "text/plain";
		case N3:
			return "text/rdf+n3";
		default:
			return "text/plain";
		}
	}