Stuff

class SAModel {
  String getName();
  void setName();
  String getDescription();
  void setDescritpion();
  Map<String, SUModel> getSUs();
  ...
}

class SUModel {
  String getName();
  String getDescription();
  List<EndpointModel> getEndpoints();
  Map getFiles();
  ...
}

class EndpointModel {
  Map<String,?> getAttributes();
}

interface SAModeler {
  SAModel loadModel(File path);
  void saveModel(File path, SAModel sa);
}