// putting in large ridiculous constant
NaiveFileFailoverManager wal = new NaiveFileFailoverManager(dir);
wal.open();
// get a sink write to it and then be done with it.
Tagger t = new ProcessTagger();
EventSink sink = wal.newWritingSink(t);
sink.open();
sink.append(new EventImpl("foo".getBytes()));
assertEquals(1, wal.getWritingTags().size());