Linkage Checker for jdom without optional dependency

memo.md

LinkageCheckerMain with -j /Users/suztomo/Downloads/jdom-2.0.2.jar option:

Class org.jaxen.BaseXPath is not found;
  referenced by 3 class files
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
    org.jdom2.xpath.jaxen.JDOMXPath (/Users/suztomo/Downloads/jdom-2.0.2.jar)
    org.jdom2.xpath.jaxen.JaxenCompiled (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.FunctionCallException is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.util.SingleObjectIterator is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.DefaultNavigator is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.saxpath.SAXPathException is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.UnsupportedAxisException is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.JaxenConstants is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMCoreNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.NamespaceContext is not found;
  referenced by 2 class files
    org.jdom2.xpath.jaxen.JDOMNavigator (/Users/suztomo/Downloads/jdom-2.0.2.jar)
    org.jdom2.xpath.jaxen.JaxenCompiled (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.JaxenException is not found;
  referenced by 2 class files
    org.jdom2.xpath.jaxen.JDOMXPath (/Users/suztomo/Downloads/jdom-2.0.2.jar)
    org.jdom2.xpath.jaxen.JaxenCompiled (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.SimpleVariableContext is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JDOMXPath (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.XPath is not found;
  referenced by 2 class files
    org.jdom2.xpath.jaxen.JDOMXPath (/Users/suztomo/Downloads/jdom-2.0.2.jar)
    org.jdom2.xpath.jaxen.JaxenCompiled (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.UnresolvableException is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JaxenCompiled (/Users/suztomo/Downloads/jdom-2.0.2.jar)
Class org.jaxen.VariableContext is not found;
  referenced by 1 class file
    org.jdom2.xpath.jaxen.JaxenCompiled (/Users/suztomo/Downloads/jdom-2.0.2.jar)