this.devicesList = new ArrayList();
	public DeviceManager( VendorManager vendorManager, DeviceGroupManager groupManager, LibraryManager libraryManager, InputStream devicesIS ) 	throws JDOMException, IOException, InvalidComponentException 	{		this.devicesByIdentifier = new HashMap();		this.groupManager = groupManager;		this.libraryManager = libraryManager;		this.vendorManager = vendorManager;		loadDevices( vendorManager, groupManager, libraryManager, devicesIS );		devicesIS.close();	}