Caused by: java.lang.NullPointerException
at net.oneandone.maven.rules.common.AbstractRule.ruleDefinedInProject(AbstractRule.java:83)
at net.oneandone.maven.rules.common.AbstractRule.ruleIsDefinedInProjectOrNotModuleParent(AbstractRule.java:70)
at net.oneandone.maven.rules.ForbidDependencyManagementInSubModulesRule.checkForSubmoduleDependencyManagement(ForbidDependencyManagementInSubModulesRule.java:48)
at net.oneandone.maven.rules.ForbidDependencyManagementInSubModulesRule.execute(ForbidDependencyManagementInSubModulesRule.java:37)
at org.apache.maven.plugins.enforcer.EnforceMojo.execute(EnforceMojo.java:193)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)