#241 Code Inspector new features

[johnyb26]

In "Code Inspector" section:
- item supporting avoidance of finalize method
reason: Item 6: Avoid finalizers p.19
"Effective Java", Joshua Bloch

- item: force private constructor if class
consists only of static methods
reason: why actually do we have to instantiate such a
class (f.e. like java.lang.Math)