public class Drums{
   //functions go here...
}
public class LatinKit extends Drums{
   //functions go here...
}
public class ElectronicKit extends Drums{
   //functions go here...
}
public class Congas extends LatinKit{
   //functions go here...
}
public class TechnoDrums extends ElectronicKit{
   //functions go here...
}