Here comes Java file structure

• org.sakaiproject.app-name
  • dao
    all dao api classes
    • impl
      all dao implementation classes
  • hbm
    hibernate mapping files only
  • logic
    all business logic api classes
    • impl
      all business logic implementation classes
  • model
    all value object POJOs
  • service (cannot use public)
    all publically accessible api classes related to the app
  • tool
    all java classes related to the tool (backing beans)
    • jsf, producers, params
      presentation specific classes related to the tool

Note: You may have your own package base instead of org.sakaiproject