diff --git a/src/main/java/CredentialRepository.java b/src/main/java/CredentialRepository.java
index 0c14d7c..9955d84 100644
--- a/src/main/java/CredentialRepository.java
+++ b/src/main/java/CredentialRepository.java
@@ -1,10 +1,20 @@
 import java.util.ArrayList;
 
+/**
+ * Credential Repository for handling user credentials
+ * @author Claudia Metzler
+ */
+
 public class CredentialRepository implements CredentialRepositoryInterface{
 
     private int idCounter = 0;
     private ArrayList<Credential> credentials;
 
+    /**
+     * Konstruktor
+     *
+     * Initializes instance variable ArrayList
+     */
     public CredentialRepository()
     {
         this.credentials = new ArrayList<Credential>();