code: public boolean isJarSigned( File jarFile )
              throws MojoExecutionException
      {
          try
          {
              return JarSignerUtil.isArchiveSigned( jarFile );
          }
          catch ( IOException e )
          {
              throw new MojoExecutionException( "Could not verifiy that jar is signed or not", e );
          }
  
      }
docs: {@inheritDoc}