8161965: Create initial javadoc description for modules

Reviewed-by: mchung, alanb, abuckley

jaxws/src/java.activation/share/classes/module-info.java

@@ -23,6 +23,9 @@
  * questions.
  */
 
+/**
+ * Defines the JavaBeans Activation Framework (JAF) API.
+ */
 module java.activation {
     requires public java.datatransfer;
     // dependence on java.beans.Beans to be eliminated

jaxws/src/java.annotations.common/share/classes/module-info.java

@@ -23,6 +23,10 @@
  * questions.
  */
 
+/**
+ * Defines a subset of the Common Annotations API to support programs running
+ * on the Java SE Platform.
+ */
 module java.annotations.common {
     exports javax.annotation;
 }

jaxws/src/java.xml.bind/share/classes/module-info.java

@@ -23,6 +23,9 @@
  * questions.
  */
 
+/**
+ * Defines the Java Architecture for XML Binding (JAXB) API.
+ */
 module java.xml.bind {
     requires public java.activation;
     requires public java.xml;

jaxws/src/java.xml.ws/share/classes/module-info.java

@@ -23,6 +23,10 @@
  * questions.
  */
 
+/**
+ * Defines the Java API for XML-Based Web Services (JAX-WS), and
+ * the Web Services Metadata API.
+ */
 module java.xml.ws {
     requires public java.activation;
     requires public java.xml;