catch nullPointerExceptions

Signed-off-by: Sebastian Schüpbach <sebastian.schuepbach@unibas.ch>
3 jobs for master in 6 minutes and 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #61465
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test-sbt

00:02:54

 
  Build
passed #61466
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assembly-sbt

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  Publish
passed #61467
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build-latest-image

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