protected void initBusinessCalendarManager() {
if (businessCalendarManager==null) {
MapBusinessCalendarManager mapBusinessCalendarManager = new MapBusinessCalendarManager();
mapBusinessCalendarManager.addBusinessCalendar(DurationBusinessCalendar.NAME, new DurationBusinessCalendar());
mapBusinessCalendarManager.addBusinessCalendar(DueDateBusinessCalendar.NAME, new DueDateBusinessCalendar());
mapBusinessCalendarManager.addBusinessCalendar(CycleBusinessCalendar.NAME, new CycleBusinessCalendar());
businessCalendarManager = mapBusinessCalendarManager;
}
}