The ensure seems to now be dead code.

We don't want to prevent users from reclaiming this resource, so there should be a close hook somewhere.

There are two twitter idioms which provide this ability.  The first is the ostrich [Service](https://github.com/twitter/ostrich/blob/master/src/main/scala/com/twitter/ostrich/admin/Service.scala) trait, which lets you explicitly start and stop the service.  The other is [Closable](https://github.com/twitter/util/blob/master/util-core/src/main/scala/com/twitter/util/Closable.scala), which just requires that you implement close.