Summary

Add serialVersionUID to fix serial warnings.

Problem

Several API classes are missing serialVersionUID.

Solution

In all cases, add serialVersionUID generated by serialver.

I've tested all classes in the specification section with JDK 1.4 to JDK 9. For each of the classes, serialver returned the same serialVersionUID if the class existed in the tested JDK version.

Specification

src/java.xml/share/classes/javax/xml/datatype/DatatypeConfigurationException.java

 public class DatatypeConfigurationException extends Exception {
+    private static final long serialVersionUID = -1699373159027047238L;

src/java.xml/share/classes/javax/xml/namespace/QName.java

 public class QName implements Serializable {
+    private static final long serialVersionUID = -9120448754896609940L;

src/java.xml/share/classes/javax/xml/parsers/ParserConfigurationException.java

 public class ParserConfigurationException extends Exception {
+    private static final long serialVersionUID = -3688849216575373917L;

src/java.xml/share/classes/javax/xml/stream/XMLStreamException.java

 public class XMLStreamException extends Exception {
+  private static final long serialVersionUID = 2018819321811497362L;

src/java.xml/share/classes/org/w3c/dom/events/EventException.java

 public class EventException extends RuntimeException {
+    private static final long serialVersionUID = 242753408332692061L;

src/java.xml/share/classes/org/w3c/dom/ls/LSException.java

 public class LSException extends RuntimeException {
+    private static final long serialVersionUID = 5371691160978884690L;

src/java.xml/share/classes/org/w3c/dom/ranges/RangeException.java

 public class RangeException extends RuntimeException {
+    private static final long serialVersionUID = 2427563372446661889L;