deleteFile(ParkingDocumentType.FIRST_CAR_INSURANCE); deleteFile(ParkingDocumentType.FIRST_CAR_OWNER_ID); deleteFile(ParkingDocumentType.FIRST_CAR_PROPERTY_REGISTER); deleteFile(ParkingDocumentType.FIRST_DECLARATION_OF_AUTHORIZATION);
deleteFirstCarFiles();
    private void deleteFirstCar() {        setFirstCarMake(null);        setFirstCarPlateNumber(null);        setFirstCarDeclarationDocumentState(null);        setFirstCarInsuranceDocumentState(null);        setFirstCarOwnerIdDocumentState(null);        setFirstCarPropertyRegistryDocumentState(null);        deleteFile(ParkingDocumentType.FIRST_CAR_INSURANCE);        deleteFile(ParkingDocumentType.FIRST_CAR_OWNER_ID);        deleteFile(ParkingDocumentType.FIRST_CAR_PROPERTY_REGISTER);        deleteFile(ParkingDocumentType.FIRST_DECLARATION_OF_AUTHORIZATION);    }