Example

public static class BeanClass implements javax.ejb.SessionBean {
private static final void ejbPostCreate () {
//..
}
//methods that must implement the interface
}

Solution
Declare the method ejbPostCreate() as public and non-static nor final


public class BeanClass implements javax.ejb.SessionBean {
public void ejbPostCreate () {
//..
}
//methods that must implement the interface
}