diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 7f884ac5498c9df2ab4b37ce4c925138d201c528..3e57d4324f60115a780ca090a5a1d1fd38110795 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -37,7 +37,7 @@
       <file leaf-file-name="RegistrationDAO.java" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/dao/RegistrationDAO.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="449">
+            <state relative-caret-position="540">
               <caret line="41" column="12" lean-forward="false" selection-start-line="41" selection-start-column="12" selection-end-line="43" selection-end-column="13" />
               <folding>
                 <marker date="1497910575000" expanded="true" signature="841:867" ph="INSERT INTO \&quot;ERR\&quot;.... " />
@@ -52,14 +52,15 @@
       <file leaf-file-name="RegistrationControl_Test.java" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/test/java/org/s4s/dao/impl/RegistrationControl_Test.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="756">
-              <caret line="66" column="59" lean-forward="false" selection-start-line="66" selection-start-column="59" selection-end-line="66" selection-end-column="59" />
+            <state relative-caret-position="771">
+              <caret line="79" column="61" lean-forward="false" selection-start-line="79" selection-start-column="61" selection-end-line="79" selection-end-column="61" />
               <folding>
-                <marker date="1497945181000" expanded="true" signature="1464:1545" ph="SELECT * FRO... user" />
-                <marker date="1497945181000" expanded="true" signature="1464:1546" ph="SELECT * FRO... user" />
-                <marker date="1497945181000" expanded="true" signature="1464:1550" ph="SELECT * FRO... user" />
-                <marker date="1497945181000" expanded="true" signature="1464:1551" ph="SELECT * FRO... user" />
-                <marker date="1497945181000" expanded="true" signature="1585:1651" ph="SELECT * FRO... user" />
+                <marker date="1497946237000" expanded="true" signature="1451:1532" ph="SELECT * FRO... user" />
+                <marker date="1497946237000" expanded="true" signature="1451:1533" ph="SELECT * FRO... user" />
+                <marker date="1497946237000" expanded="true" signature="1451:1537" ph="SELECT * FRO... user" />
+                <marker date="1497946237000" expanded="true" signature="1451:1538" ph="SELECT * FRO... user" />
+                <marker date="1497946237000" expanded="true" signature="1572:1638" ph="SELECT * FRO... user" />
+                <marker date="1497946237000" expanded="true" signature="2436:2514" ph="DELETE FROM " />
               </folding>
             </state>
           </provider>
@@ -594,8 +595,8 @@
           </PATH>
         </subPane>
       </pane>
-      <pane id="Scratches" />
       <pane id="PackagesPane" />
+      <pane id="Scratches" />
       <pane id="Scope" />
     </panes>
   </component>
@@ -1157,13 +1158,11 @@
       <workItem from="1497902421348" duration="3435000" />
       <workItem from="1497907375567" duration="5487000" />
       <workItem from="1497944732211" duration="476000" />
+      <workItem from="1497946000359" duration="267000" />
     </task>
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="RegistrationControl_Test - 2017.06.20 at 00h 47m 11s.xml">
-      <configuration name="RegistrationControl_Test" configurationId="JUnit" />
-    </history-entry>
     <history-entry file="RegistrationControl_Test - 2017.06.20 at 00h 50m 35s.xml">
       <configuration name="RegistrationControl_Test" configurationId="JUnit" />
     </history-entry>
@@ -1191,9 +1190,12 @@
     <history-entry file="RegistrationControl_Test - 2017.06.20 at 09h 53m 04s.xml">
       <configuration name="RegistrationControl_Test" configurationId="JUnit" />
     </history-entry>
+    <history-entry file="RegistrationControl_Test - 2017.06.20 at 10h 10m 43s.xml">
+      <configuration name="RegistrationControl_Test" configurationId="JUnit" />
+    </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="70992000" />
+    <option name="totallyTimeSpent" value="71259000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1920" height="1080" extended-state="0" />
@@ -1614,7 +1616,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/main/java/org/s4s/dao/RegistrationDAO.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="449">
+        <state relative-caret-position="540">
           <caret line="41" column="12" lean-forward="false" selection-start-line="41" selection-start-column="12" selection-end-line="43" selection-end-column="13" />
           <folding>
             <marker date="1497910575000" expanded="true" signature="841:867" ph="INSERT INTO \&quot;ERR\&quot;.... " />
@@ -1627,14 +1629,15 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/test/java/org/s4s/dao/impl/RegistrationControl_Test.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="756">
-          <caret line="66" column="59" lean-forward="false" selection-start-line="66" selection-start-column="59" selection-end-line="66" selection-end-column="59" />
+        <state relative-caret-position="771">
+          <caret line="79" column="61" lean-forward="false" selection-start-line="79" selection-start-column="61" selection-end-line="79" selection-end-column="61" />
           <folding>
-            <marker date="1497945181000" expanded="true" signature="1464:1545" ph="SELECT * FRO... user" />
-            <marker date="1497945181000" expanded="true" signature="1464:1546" ph="SELECT * FRO... user" />
-            <marker date="1497945181000" expanded="true" signature="1464:1550" ph="SELECT * FRO... user" />
-            <marker date="1497945181000" expanded="true" signature="1464:1551" ph="SELECT * FRO... user" />
-            <marker date="1497945181000" expanded="true" signature="1585:1651" ph="SELECT * FRO... user" />
+            <marker date="1497946237000" expanded="true" signature="1451:1532" ph="SELECT * FRO... user" />
+            <marker date="1497946237000" expanded="true" signature="1451:1533" ph="SELECT * FRO... user" />
+            <marker date="1497946237000" expanded="true" signature="1451:1537" ph="SELECT * FRO... user" />
+            <marker date="1497946237000" expanded="true" signature="1451:1538" ph="SELECT * FRO... user" />
+            <marker date="1497946237000" expanded="true" signature="1572:1638" ph="SELECT * FRO... user" />
+            <marker date="1497946237000" expanded="true" signature="2436:2514" ph="DELETE FROM " />
           </folding>
         </state>
       </provider>
diff --git a/src/test/java/org/s4s/dao/impl/RegistrationControl_Test.java b/src/test/java/org/s4s/dao/impl/RegistrationControl_Test.java
index 8b0619f1183caeedc693873ba286bebe13e671e2..559dbdef52214494b5030ef66d6e13df3a7d56fe 100644
--- a/src/test/java/org/s4s/dao/impl/RegistrationControl_Test.java
+++ b/src/test/java/org/s4s/dao/impl/RegistrationControl_Test.java
@@ -48,7 +48,6 @@ public class RegistrationControl_Test {
         user.setVorname("Tester");
     }
 
-//unfinished
     @Test
     public void Registration_Test() {
 
@@ -72,4 +71,17 @@ public class RegistrationControl_Test {
 
     }
 
+    @After
+    public void delete(){
+        String sql_delete = "DELETE FROM \"ERR\".\"user\" u "+ " WHERE u.benutzername = '" + "Testcase" +"';";
+        try {
+            int exe = JDBCConnection.getInstance().getStatement().executeUpdate(sql_delete);
+            if(exe<0){
+                throw new WrongInputException("Wrong input");
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
 }