Mechanical code cleanup (commons)
* Remove unnecessary type specifiers (use Java 7 <>)
* Remove unnecessary "extends Object" declarations
* Remove unnecessary semi-colons
* Merge identical catch blocks
* Remove redundant modifiers:
- enum constructors are private by default
- interface properties are public static final by default
- interface methods are public abstract by default
- interfaces are abstract by default
- inner interfaces are static by default
- inner classes in interfaces are public static by default
Change-Id: If1805b63e52c1ab0c68983e7856e7ccf184cb2a9
Signed-off-by: Stephen Kitt <skitt@redhat.com>