Added missing @NotNullByDefault annotation

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Use latest parent

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Update license header

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Use latest java-parent

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Whitespace fix

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added PMD braces rule set constants

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added PMD clone rule set constants

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added PMD code size rule set constants

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added PMD comments rule set constants

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added marker for the controversial rule set

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added constants for the PMD coupling rule set

Signed-off-by: Sebastian Hoß <mail@shoss.de>
Added markers for missing constants

Signed-off-by: Sebastian Hoß <mail@shoss.de>