public void addUserAllowedToCreate(JID userJID) {
        // Update the list of allowed JIDs to create nodes.
        final Set<JID> existing = PUBSUB_ALLOWED_TO_CREATE.getValue();
        existing.add( userJID.asBareJID() );
        PUBSUB_ALLOWED_TO_CREATE.setValue( existing );
    }
Manager of entities that interact with persistent storage of data (eg: the database).
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/PubSubModule.java