NPE trying to determine field names with a blank file

[jcustenborder]

org.apache.kafka.connect.errors.ConnectException: java.lang.NullPointerException
        at com.github.jcustenborder.kafka.connect.spooldir.AbstractSourceTask.read(AbstractSourceTask.java:249)
        at com.github.jcustenborder.kafka.connect.spooldir.AbstractSourceTask.poll(AbstractSourceTask.java:148)
        at org.apache.kafka.connect.runtime.WorkerSourceTask.poll(WorkerSourceTask.java:276)
        at org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:243)
        at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:185)
        at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:235)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
        at java.util.Objects.requireNonNull(Objects.java:203)
        at java.util.Arrays$ArrayList.<init>(Arrays.java:3813)
        at java.util.Arrays.asList(Arrays.java:3800)
        at com.google.common.base.Joiner.join(Joiner.java:203)
        at com.github.jcustenborder.kafka.connect.spooldir.SpoolDirCsvSourceTask.configure(SpoolDirCsvSourceTask.java:61)
        at com.github.jcustenborder.kafka.connect.spooldir.AbstractSourceTask.read(AbstractSourceTask.java:247)
        ... 10 more