public void addSysadmin(JID userJID) {
        final Set<JID> existing = PUBSUB_SYSADMINS.getValue();
        existing.add( userJID.asBareJID() );
        PUBSUB_SYSADMINS.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