private void checkAllSelectedGefaehrdungen() {
    List<Gefaehrdung> toCheck = new ArrayList<Gefaehrdung>();
    for (GefaehrdungsUmsetzung associatedGefaehrdung : wizard.getAssociatedGefaehrdungen()) {
      for (Gefaehrdung gefaehrdung : wizard.getAllGefaehrdungen()) {
        if (gefaehrdung.getId().equals(associatedGefaehrdung.getId())) {
          toCheck.add(gefaehrdung);
        }
      }
    }

    Gefaehrdung[] checkarray = toCheck.toArray(new Gefaehrdung[toCheck.size()]);
    viewer.setCheckedElements(checkarray);
  }