Nifi Registry Flow Versioning with Mongodb

Question

I have been trying to add the Flow versions data into a mongodb cluster. I wanted to understand if the metadata syncrhonization could also be stored to a mongodb and instead of providing the default h2 driver, could I provided a mongodb driver. If yes is there some other interface I need to implement other than MetadataAwareFlowPersistenceProvider. Or I need to override the funcitons of DatabaseFlowPersistenceProvider.

nifi.registry.db.url=jdbc:mongo:./database/nifi-registry-primary
nifi.registry.db.driver.class=org.MongoDriver.Driver

Class implementation of MetadataAwareFlowPersistenceProvider

public class MongoMetadaAwareFlowPersistenceProvider implements MetadataAwareFlowPersistenceProvider
    MongoClient mongoClient;

    public MongoMetadaAwareFlowPersistenceProvider(){
        initialize();
    }

    public initialize(){
        MongoClient mongoClient = new MongoClient();
    }
}