pom.xml of findbugs-2.0.3 is not ready to generate javadoc.jar
and sources.jar. this jar file is dummy which is requested by Sonatype.

see https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-6.CentralSyncRequirement
