slight improvement of message and autostyle fixes

biopet-core/src/main/scala/nl/lumc/sasc/biopet/core/MultiSampleQScript.scala

@@ -143,7 +143,7 @@ trait MultiSampleQScript extends SummaryQScript { qscript: QScript =>
     protected def libIds: Set[String] = {
       val ids = ConfigUtils.getMapFromPath(globalConfig.map, List("samples", sampleId, "libraries")).getOrElse(Map()).keySet
       if (ids.isEmpty) {
-        throw new IllegalArgumentException("No libraries found  in config")
+        logger.error(s"No libraries found in config for sample $sampleId", IllegalArgumentException)
       }
       ids
     }

mapping/src/test/scala/nl/lumc/sasc/biopet/pipelines/mapping/MappingTest.scala

@@ -14,7 +14,7 @@
  */
 package nl.lumc.sasc.biopet.pipelines.mapping
 
-import java.io.{File, FileOutputStream}
+import java.io.{ File, FileOutputStream }
 
 import com.google.common.io.Files
 import nl.lumc.sasc.biopet.core.BiopetCommandLineFunction