gwt google appengine with hibernate

My GWT project is setup with google app engine. Now I want to run the hibernate code in Google app engine.

I have added businesslogic jar files which contains all the business logic with hibernate implemntation. I placed my businesslogic jar file WEB-INF\lib folder and added to classpath. After running the application and when I click login button,it should validate the username and password.this user validation has been implements through hibernate.But it throws the following exception.

    Caused by: org.datanucleus.exceptions.NucleusUserException: No available StoreManager
    found for the 开发者_StackOverflow中文版datastore URL key "jdbc". Please make sure you have all relevant 
    plugins in the CLASSPATH (e.g datanucleus-rdbms?, datanucleus-db4o?), and consider 
    setting the persistence property "datanucleus.storeManagerType" to the type of store 
    you are using e.g rdbms, db4o

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AppEngine is not an RDBMS! It does not run Hibernate. DataNucleus OTOH is a JDO/JPA persistence solution that allows persistence to BigTable (the datastore in GAE/J)