Declare visibility on class properties

Declare visibility on class properties

As pointed out by phpcs:

 The var keyword must not be used to declare a property
 (PSR2.Classes.PropertyDeclaration.VarUsed)

Set to public, as this is also done for class properties in classes these
ones extend.

Also break some long lines to silence CodeSniffer.

Change-Id: I77dd45eb2bf1d405d429603b97d5cbfb7ea04ad0