Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Exception was thrown while processing /data/home/gsmet/git/gsmet/hibernate-search/engine/src/main/java/org/hibernate/search/annotations/TermVector.java
	at com.puppycrawl.tools.checkstyle.Checker.processFiles(Checker.java:319)
	at com.puppycrawl.tools.checkstyle.Checker.process(Checker.java:275)
	at org.apache.maven.plugin.checkstyle.exec.DefaultCheckstyleExecutor.executeCheckstyle(DefaultCheckstyleExecutor.java:252)
	at org.apache.maven.plugin.checkstyle.CheckstyleViolationCheckMojo.execute(CheckstyleViolationCheckMojo.java:538)
	... 22 more
Caused by: java.lang.NullPointerException
	at org.hibernate.checkstyle.checks.regexp.IllegalImport.visitToken(IllegalImport.java:56)
	at com.puppycrawl.tools.checkstyle.TreeWalker.notifyVisit(TreeWalker.java:363)
	at com.puppycrawl.tools.checkstyle.TreeWalker.processIter(TreeWalker.java:478)
	at com.puppycrawl.tools.checkstyle.TreeWalker.walk(TreeWalker.java:305)
	at com.puppycrawl.tools.checkstyle.TreeWalker.processFiltered(TreeWalker.java:181)
	at com.puppycrawl.tools.checkstyle.api.AbstractFileSetCheck.process(AbstractFileSetCheck.java:80)
	at com.puppycrawl.tools.checkstyle.Checker.processFile(Checker.java:339)
	at com.puppycrawl.tools.checkstyle.Checker.processFiles(Checker.java:309)