private void exportXLSLine(final HSSFSheet sheet, final HSSFCellStyle cellStyle, final List<String> cells) {
private void exportXLSLine(final HSSFSheet sheet, final HSSFCellStyle cellStyle, final List<Object> cells) {
    private void exportXLSLine(final HSSFSheet sheet, final HSSFCellStyle cellStyle, final List<String> cells) {        exportXLSLine(sheet, cellStyle, cells, 1);    }