performingTasks = new ArrayList <TaskDescriptor>() ;
performingTasks = new ArrayList <TaskDefinition>() ;
	public HumanResource (String _id, String _fullName)	{		super() ;		this.id = _id ;		this.fullName = _fullName ;		performingRoles = new ArrayList <RoleDescriptor>() ;		performingTasks = new ArrayList <TaskDescriptor>() ;	}