public void addAssociatedGefahr(GefaehrdungsUmsetzung gefaehrdung){
  if (!associatedGefaehrdungen.contains(gefaehrdung)) {
    associatedGefaehrdungen.add(gefaehrdung);
  }
}

public void addAssociatedGefahr ( GefaehrdungsUmsetzung gefaehrdung ) { if ( ! associatedGefaehrdungen . contains ( gefaehrdung ) ) { associatedGefaehrdungen . add ( gefaehrdung ) ; } }
adds a gefaehrdung to the list of all gefaehrdungen if gefaehrdung not already exits .
