https://github.com/FasterXML/woodstox: Woodstox is a high-performance XML processor that implements Stax (JSR-173), SAX2 and Stax2 APIs (FasterXML)
  • Tatu Saloranta 
package com.ctc.wstx.exc;


Exception class used for notifying about well-formedness errors that
writers would create. Such exceptions are thrown when strict output
validation is enabled.

/**
 * Exception class used for notifying about well-formedness errors that
 * writers would create. Such exceptions are thrown when strict output
 * validation is enabled.
 */
@SuppressWarnings("serial")
public class WstxOutputException
    extends WstxException
{
    public WstxOutputException(String msg) {
        super(msg);
    }
}