Nifi Registry with Mongodb

I have been trying to add the Flow versions data into a mongodb cluster. Wanted to understand if setting the nifi registry db properties will do the job or I need to implement a MetadataAwareFlowPersistanceProvider to intake a mongodbclient.

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();
    }
}