IOException is never thrown

Change-Id: I8edd8c0e7119a0de8bb8b5ecc1fdf68dcf6578aa
Reviewed-on: http://review.couchbase.org/27959
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>