diff --git a/full/src/main/java/de/ids_mannheim/korap/dto/converter/UserGroupConverter.java b/full/src/main/java/de/ids_mannheim/korap/dto/converter/UserGroupConverter.java
index 5071635..cf5878f 100644
--- a/full/src/main/java/de/ids_mannheim/korap/dto/converter/UserGroupConverter.java
+++ b/full/src/main/java/de/ids_mannheim/korap/dto/converter/UserGroupConverter.java
@@ -1,6 +1,7 @@
 package de.ids_mannheim.korap.dto.converter;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 
@@ -12,7 +13,6 @@
 import de.ids_mannheim.korap.entity.Role;
 import de.ids_mannheim.korap.entity.UserGroup;
 import de.ids_mannheim.korap.entity.UserGroupMember;
-import edu.emory.mathcs.backport.java.util.Collections;
 
 /**
  * UserGroupConverter manages conversion of {@link UserGroup} objects
diff --git a/full/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java b/full/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java
index 71c5903..43681bd 100644
--- a/full/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java
+++ b/full/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java
@@ -2,6 +2,7 @@
 
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import org.apache.logging.log4j.LogManager;
@@ -21,7 +22,6 @@
 import de.ids_mannheim.korap.user.User.CorpusAccess;
 import de.ids_mannheim.korap.utils.JsonUtils;
 import de.ids_mannheim.korap.utils.KoralCollectionQueryBuilder;
-import edu.emory.mathcs.backport.java.util.Arrays;
 
 /** CollectionRewrite determines which availability field values are 
  *  possible for a user with respect to his mean and location of access.
diff --git a/full/src/test/java/de/ids_mannheim/korap/misc/BCryptTest.java b/full/src/test/java/de/ids_mannheim/korap/misc/BCryptTest.java
index ec8c85d..37d81a0 100644
--- a/full/src/test/java/de/ids_mannheim/korap/misc/BCryptTest.java
+++ b/full/src/test/java/de/ids_mannheim/korap/misc/BCryptTest.java
@@ -10,11 +10,11 @@
     @Test
     public void testSalt () {
         String salt = BCrypt.gensalt(8);
-        System.out.println(salt);
+//        System.out.println(salt);
 
         String plain = "secret";
         String password = BCrypt.hashpw(plain, salt);
-        System.out.println(password);
+//        System.out.println(password);
         
         assertTrue(BCrypt.checkpw(plain, password));
     }