Get rid of deprecated new instance calls

[FSchumacher]

Description

This basically is an update to #431

Get rid of calls to Class#newInstance() by replacing them with Class#getDeclaredConstructor()#newInstance()

And while I edited the classes I cleaned them up a bit, when eclipse showed warnings. I think those snippets should be committed separately, but I left them in here, so that they can be discussed if necessary.

Motivation and Context

Java 9 deprecates Class#newInstance().

How Has This Been Tested?

Tests should run when github merges this for testing.

Screenshots (if appropriate):

Types of changes

• cleanup

Checklist:

• My code follows the code style of this project.