This bug is inconsistently reproducible; however
exception should be handled gracefully

Build used:
   AppServer and Netbean: FCS
   Plugin: 04/16

STEPS TO REPRODUCE:
1. Start Netbean IDE > AppServer
2. Create a web module with adding some elements
below to the web.xml file
       <resource-ref>
           <description></description>
          
<res-ref-name>jdbc/jdbc-simple</res-ref-name>
           <res-type>javax.sql.DataSource</res-type>
           <res-auth>Container</res-auth>
       </resource-ref>

       <message-destination-ref>
         
<message-destination-ref-name>jms/QueueName</message-destination-ref-name>
         
<message-destination-type>javax.jms.Queue</message-destination-type>
         
<message-destination-usage>Produces</message-destination-usage>
         
<message-destination-link>LogicalQueue</message-destination-link>
      </message-destination-ref>
          
3. Deploy the web module
4. Higligh 
          <resource-ref>
           <description></description>
          
<res-ref-name>jdbc/jdbc-simple</res-ref-name>
           <res-type>javax.sql.DataSource</res-type>
           <res-auth>Container</res-auth>
       </resource-ref>

And replace them with "incorect syntax" below:
    
<res-ref-name>jms/MyConnectionFactory</res-ref-name>
    
<jndi-name>jms/QueueConnectionFactory</jndi-name> 

BUG:
     NPE occurs - ide.log file attached
------------------------------------------------------------------
java.lang.NullPointerException
	at
org.netbeans.modules.j2ee.deployment.config.ConfigBeanStorage.removeChild(ConfigBeanStorage.java:137)
	at
org.netbeans.modules.j2ee.deployment.config.ConfigBeanStorage.fireEvent(ConfigBeanStorage.java:111)
	at
org.netbeans.modules.j2ee.deployment.config.DDCommon.fireEvent(DDCommon.java:230)
............
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