code: static void create(ZooKeeper zookeeper, String znode) throws KeeperException, InterruptedException {
          zookeeper.create(znode, new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
      }
docs: Create an empty normal (persistent) Znode.
  
  @param zookeeper ZooKeeper instance to work with.
  @param znode     Znode to create.
  @throws KeeperException
  @throws InterruptedException