const OSType kMyAppCreatorCode = ' Zzzz ';

- (NSDictionary *)fileAttributesToWriteToURL:(NSURL *)absoluteURL
ofType:(NSString *)typeName
forSaveOperation:(NSSaveOperationType)saveOperation
originalContentsURL:(NSURL *)absoluteOriginalContentsURL
error:(NSError **)outError
{
NSMutableDictionary *fileAttributes =
[[super fileAttributesToWriteToURL:absoluteURL
ofType:typeName forSaveOperation:saveOperation
originalContentsURL:absoluteOriginalContentsURL
error:outError] mutableCopy];
[fileAttributes setObject:[NSNumber numberWithUnsignedInt:kMyAppCreatorCode]
forKey:NSFileHFSCreatorCode];
[fileAttributes setObject:[NSNumber numberWithUnsignedInt:kMyDocumentTypeCode]
forKey:NSFileHFSTypeCode];
return [fileAttributes autorelease];
}