// Tasks exportieren
Map<Long, WorkPackageEmployeeInfo> workPackageEmployeeMap =
new HashMap<Long, WorkPackageEmployeeInfo>();
List<WorkPackage> workPackages = p.getWorkPackages();
Collections.sort(workPackages, new WorkPackageComparator());
if (workPackages.size() > 0) {
List<WorkPackage> tree = new LinkedList<WorkPackage>();
for (WorkPackage w : workPackages) {
if (w.isRoot()) {