restrict sqlite-wal and sqlite-shm from icloud backup

I am working with coredata for the first time and I have to restrict the sqlite db file from iCloud backup which is in documents directory and i have done it using the below code

-(id)init
{
    if((self = [super init]))
    {
        NSURL* documentsDirectoryURL = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
        NSURL* modelURL = [[NSBundle mainBundle] URLForResource:@"Model" withExtension:@"momd"];
        NSURL* giveForwardSqliteURL = [documentsDirectoryURL URLByAppendingPathComponent:@"InfoCollection.sqlite"];
        NSError* error;

        m_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];    
        m_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:m_managedObjectModel];

        NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                             [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
                             [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];


        if ([m_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:giveForwardSqliteURL options:options error:&error])
        {
            m_managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
            [m_managedObjectContext setPersistentStoreCoordinator:m_persistentStoreCoordinator];

            [self addSkipBackupAttributeToItemAtPath:giveForwardSqliteURL];
        }
        else
        {
            NSLog(@"Failed to create or open database: %@", [error userInfo]);
            return nil;
        }
    }

    return self;
}

//Prevent iCloud to take backup of documents directory folder

- (BOOL)addSkipBackupAttributeToItemAtPath:(NSURL *) URL
{
    assert([[NSFileManager defaultManager] fileExistsAtPath: [URL path]]);

    NSError *error = nil;
    BOOL success = [URL setResourceValue: [NSNumber numberWithBool: YES]
                              forKey: NSURLIsExcludedFromBackupKey error: &error];
    if(!success){
        NSLog(@"Error excluding %@ from backup %@", [URL lastPathComponent], error);
    }
    return success;
}

Now what i didn't understand is do we also need to restrict sqlite-wal and sqlite-shm files from icloud backup, if yes then how to restrict sqlite-wal and sqlite-shm files from icloud backup

And i want a solution without changing the sqlite db location from documents directory folder... how can we do it

Please correct if anything is wrong in the above code

Thanks in advance