FactoryConfigurationError should be modified so that the nested exception properly participates in the JDK's own exception chaining mechanism.

Specifically, change this:

    public FactoryConfigurationError(Exception e) {
        super(e.toString());
        this.exception = e;
    }

... to ...

    public FactoryConfigurationError(Exception e) {
        super(e);
        this.exception = e;
    }

and this ...

    public FactoryConfigurationError(Exception e, String msg) {
        super(msg);
        this.exception = e;
    }

to ...

    public FactoryConfigurationError(Exception e, String msg) {
        super(msg,e);
        this.exception = e;
    }


This would allow e.printStackTrace() method to display the linked exceptions correctly, which is helpful for trouble-shooting FactoryConfigurationError.