Update .gitlab-ci

.gitlab-ci.yml

@@ -19,7 +19,7 @@ test:mvn:jdk8:
   stage: test
   image: maven:3.5.3-jdk-8
   script:
-    - mvn clean verify -Dgpg.skip -Dmaven.repo.local=.m2
+    - mvn clean verify -Dgpg.skip -Dmaven.repo.local=.m2 -q
 
 
 ##mvn:jdk11:

src/main/java/be/cylab/java/wowa/training/Trainer.java

@@ -11,7 +11,11 @@ import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Random;
 import java.util.logging.Level;
 
 /**