Some Objective-C 2.0

/**
    Returns the persistent store coordinator for the application.  This 
    implementation will create and return a coordinator, having added the 
    store for the application to it.  (The directory for the store is created, 
    if necessary.)
 */

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

    if (persistentStoreCoordinator) return persistentStoreCoordinator;

    NSManagedObjectModel *mom = [self managedObjectModel];
    if (!mom) {
        NSAssert(NO, @"Managed object model is nil");
        BSLog(@"%@:%s No model to generate a store from", [self class], _cmd);
        return nil;
    }

    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *applicationSupportDirectory = [self applicationSupportDirectory];
    NSError *error = nil;
    
    if ( ![fileManager fileExistsAtPath:applicationSupportDirectory isDirectory:NULL] ) {
    if (![fileManager createDirectoryAtPath:applicationSupportDirectory withIntermediateDirectories:NO attributes:nil error:&error]) {
            NSAssert(NO, ([NSString stringWithFormat:@"Failed to create App Support directory %@ : %@", applicationSupportDirectory,error]));
            BSLog(@"Error creating application support directory at %@ : %@",applicationSupportDirectory,error);
            return nil;
    }
    }
    
    NSURL *url = [NSURL fileURLWithPath:[applicationSupportDirectory stringByAppendingPathComponent:@"storedata"]];
    persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: mom];
    
  // Persistent store migration Options
  NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption, [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];
  
  NSPersistentStore *persistentStore = [persistentStoreCoordinator addPersistentStoreWithType:NSXMLStoreType configuration:nil URL:url options:options error:&error];
  
    if (!persistentStore){
        [[NSApplication sharedApplication] presentError:error];
        [persistentStoreCoordinator release], persistentStoreCoordinator = nil;
        return nil;
    }    

  // Enable syncing on the store
//  [persistentStoreCoordinator setStoresFastSyncDetailsAtURL:[self URLForFastSyncDetails] forPersistentStore:persistentStore];
  
    return persistentStoreCoordinator;
}