Using JDO with MySQL

I recently worked with Java Data Object( JDO ) on my machine to store and retrieve data from a local MySQL database. Following is the procedure how I did it. I used Eclipse IDE for writing JAVA codes.

*** Important: To build and run the project this post is useful.

First I created a property file that contains necessary information for connecting to the local MySQL and used by JDO api to create PersistenceManagerFactory class. Put the file in project's root folder.
File    : datanucleus.properties
Code : http://pastebin.com/0npQb4ag
Update username , password ,db-name according to yours.

Then I created a class named "UserInfo" to store username , password , email-address.

File    : UserInfo.java

Code : http://pastebin.com/CAMth7db

For the annotaions' guideline visit here 
Then I created a class named PMF.java to make sure that only one instance of PersistenceManagerFactory  is used through out the application. That file uses datanucleus.properties
file.
File    : PMF.java
Code : http://pastebin.com/24tcVgGk
Finally to test everything works I write TestJDO.java to test every thing works fine.
File    : TestJDO.java
Code :  http://pastebin.com/zeJgpcp9