writer.print('"');
if(i < header.length - 1)
writer.print(',');
}
writer.println();
Vector periods = periodDAO.findAll();
controler.progressListner.setMaxValue(periods.size() * 100);
for (int i = 0; i < periods.size(); ++i) {
Period period = (Period) periods.elementAt(i);
Vector ids = periodDAO.getObservationIds(period);
for (int j = 0; j < ids.size(); ++j) {