diff --git a/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/DataInsert.java b/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/DataInsert.java
index 150f5286d85501b12d13936ad1110f06c32321e5..19fa7f9792864a4af159e65fd5f44324a676c5d7 100644
--- a/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/DataInsert.java
+++ b/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/DataInsert.java
@@ -26,7 +26,6 @@ public class DataInsert {
 	 * lacking age specification.
 	 * @param productId  See {@link #insertproduct(String, String, int)}
 	 * @param productName See {@link #insertproduct(String, String, int)}
-	 * @throws SQLException 
 	 */
 	public void insertproduct(final String productId, final String productName) {
       final String sqlInsertStmt = "INSERT INTO Product (id, name) VALUES ('" + productId + "', '" + productName +  "');";
@@ -43,7 +42,6 @@ public class DataInsert {
 	 * @param productId The product's unique id property
 	 * @param productName The product's end user readable name.
 	 * @param age The product's age
-	 * @throws SQLException 
 	 */
 	public void insertproduct(final String productId, final String productName, final int age)  {
 	   
@@ -63,7 +61,6 @@ public class DataInsert {
 	 * 
 	 * @param productId The description belongs to this product 
 	 * @param descriptions All descriptions belonging to productId
-	 * @throws SQLException 
 	 */
 	public void insertDescription(final String productId, final List<String> descriptions) {
 	   
@@ -77,6 +74,10 @@ public class DataInsert {
          }
 		}
 	}
+	/**
+	 * Closing internal Statement instance
+	 * @throws SQLException
+	 */
 	public void close() throws SQLException {
 	   stmt.close();
 	}
diff --git a/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/Helper.java b/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/Helper.java
index 06e88f12eb2fa054def5620fec5f73278b3e99cf..b59d33d53dc9a4c16d603f9ee3f8b6e078284f84 100644
--- a/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/Helper.java
+++ b/Sda1/P/catalog2rdbms/src/main/java/de/hdm_stuttgart/mi/sda1/catalog2sql/Helper.java
@@ -1,6 +1,15 @@
 package de.hdm_stuttgart.mi.sda1.catalog2sql;
 
+/**
+ * Project wide helper methods
+ *
+ */
 public class Helper {
+   /**
+    * Write message to stderr and exit with given error code
+    * @param errMsg
+    * @param errorCode
+    */
    public static void exitWithErrorMessage(final String errMsg, int errorCode) {
       System.err.println(errMsg);
       System.exit(errorCode);