avoid warning
List is a raw type. References to generic type List<E> should be
parameterized
avoid warning
Enumeration is a raw type. References to generic type Enumeration<E>
should be parameterized
avoid warning
Class is a raw type. References to generic type Class<T> should be
parameterized
avoid warning
Class is a raw type. References to generic type Class<T> should be
parameterized
avoid warnings about not paramterized types