39c39,55
< 	public FileFilter getFileFilter();
---
> 	FileFilter getFileFilter();
> 
> 	/**
> 	 * Every format has to identify itself as able to store and/or restore from
> 	 * the format it represents. If the storage format can save to the format, it
> 	 * should return true in this method.
> 	 * @return boolean <code>true</code> if the format can save
> 	 */
> 	boolean isStoreFormat();
> 
> 	/**
> 	 * Every format has to identify itself as able to store and/or restore from
> 	 * the format it represents. If the storage format can load from the format,
> 	 * it should return true in this method.
> 	 * @return boolean <code>true</code> if the format can load
> 	 */
> 	boolean isRestoreFormat(); 
48c64
< 	public String store(String fileName, Drawing saveDrawing) throws IOException;
---
> 	String store(String fileName, Drawing saveDrawing) throws IOException;
56c72,73
< 	public Drawing restore(String fileName) throws IOException;
---
> 	Drawing restore(String fileName) throws IOException;
>