private void initArticleColumn(Row row) {
        Cell cell = row.getCell(articleColumnIndex);
        if (cell == null) {
            cell = row.createCell(articleColumnIndex);
        }
        String val = WorkbookUtil.getCellValueAsString(cell);
        if (val == null || val.trim().length() == 0) {
            val = combineCellValues(row, vendorColumnIndex, nameColumnIndex);
            if (val.trim().length() != 0) {
                WorkbookUtil.setCellForeground(cell, IndexedColors.YELLOW.getIndex());
            }
        }
        cell.setCellValue(val);
    }