private Vector<Vector<Cell>> leerArchivoExcel(HSSFWorkbook archivo) {
        Vector<Vector<Cell>> cellVectorHolder = new Vector<Vector<Cell>>();
        try {
            HSSFSheet mySheet = archivo.getSheetAt( 0 );
            Iterator<Row> rowIter = mySheet.rowIterator();
            while (rowIter.hasNext()) {
                Row myRow = rowIter.next();
                Vector<Cell> cellStoreVector = new Vector<Cell>();
                int lastColumn = Math.max( myRow.getLastCellNum(), 5 );
                for (int cn = 0; cn < lastColumn; cn++) {
                    Cell c = myRow.getCell( cn, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK );
                    cellStoreVector.addElement( c );
                }
                cellVectorHolder.addElement( cellStoreVector );
            }
        } catch (Exception e) {
            LOG.error(e.getMessage());
        }
        return cellVectorHolder;
    }