NPE in PhraseExporter

[mikewalch]

java.lang.NullPointerException: null
        at phrasecount.PhraseExporter.process(PhraseExporter.java:87) ~[phrasecount-0.0.1-SNAPSHOT.jar:na]
        at accismus.impl.Worker.processUpdates(Worker.java:174) ~[accismus-core-1.0.0-alpha-1-SNAPSHOT.jar:na]
        at accismus.impl.WorkerTask.run(WorkerTask.java:67) [accismus-core-1.0.0-alpha-1-SNAPSHOT.jar:na]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_55]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_55]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_55]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_55]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_55]