_model.addRole("Manager");
_model.addRole("Worker");
_model.addRole("Buyer");
_model.addRole("Earner");
HumanResource fredRes = new HumanResource("fred");
fredRes.setDescription("A description about Fred");
fredRes.setGivenName("Fred");
fredRes.setIsAdministrator(true);
fredRes.setIsOfResSerPosType("Resource");
fredRes.setPassword("password");
fredRes.setSurname("Jones");
_model.addResource(fredRes);
HumanResource peteRes = new HumanResource("Pete");
peteRes.setDescription("A description about Pete");
peteRes.setGivenName("Pete");
peteRes.setIsAdministrator(true);
peteRes.setIsOfResSerPosType("Resource");
peteRes.setPassword("password");
peteRes.setSurname("Hubbert");
_model.addResource(peteRes);
_model.addHresPerformsRole("fred", "Manager");
}