'final'ize 'testing' classes

testing/src/main/java/de/staropensource/engine/testing/UnitConfig.java

@@ -26,7 +26,7 @@ import de.staropensource.engine.base.type.logging.LogLevel;
  *
  * @since v1-alpha4
  */
-public class UnitConfig {
+public final class UnitConfig {
     /**
      * Creates and initializes an instance of this class.
      *

testing/src/main/java/de/staropensource/engine/testing/UnitLogger.java

@@ -28,9 +28,9 @@ import org.jetbrains.annotations.Nullable;
  *
  * @since v1-alpha0
  */
-public class UnitLogger {
+public final class UnitLogger {
     /**
-     * The parent class this instance belongs to.
+     * Contains the parent class this instance belongs to.
      *
      * @since v1-alpha4
      */