private void addEmptyRows(List<String> rawItems){
  List<String> emptyRows=Arrays.asList(EMPTY_STRING,EMPTY_STRING);
  List<String> items=new ArrayList<String>();
  items.addAll(emptyRows);
  items.addAll(rawItems);
  items.addAll(emptyRows);
  this.items=items;
}

private void addEmptyRows ( List < String > rawItems ) { List < String > emptyRows = Arrays . asList ( EMPTY_STRING , EMPTY_STRING ) ; List < String > items = new ArrayList < String > ( ) ; items . addAll ( emptyRows ) ; items . addAll ( rawItems ) ; items . addAll ( emptyRows ) ; this . items = items ; }
the first two positions must be empty . the last 2 positions must be empty too .
