You need to import the generated _Notificator_Stub to the UtilCallback project in your Developer Studio so that it can be packaged in the EJB JAR file you are about to generate out of it.
Use the function of the Developer Studio that imports resources located on the file system.
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1. From the main menu, choose File → Import.
2. From the Import screen that appears, choose File system and then choose Next.
3. In the From directory field on the new screen, browse to the folder where the _Notificator_Stub.java file is stored. The content of the directory is listed in the right-hand side pane below. You must select the _Notificator_Stub.java from the list.
4. In the Into folder field, browse to the <Developer_Studio_dir>\workspace\UtilCallback\ejbModule\examples\iiop directory where the source files of the UtilCallback project are located.
5. In the Options pane, choose the Create selected folders only option.
6. Choose Finish to add the stub to the project.
Now the appropriate stub for the Notificator class is imported to the UtilCallbackproject. You must now save the project content so that the stub gets compiled.
At the end of this procedure, you have successfully developed the source files of the UtilCallback application. You can go on with assembling the EJB JAR.
Assembling the Callback Application