diff --git a/src/org/kar/archidata/SqlWrapper.java b/src/org/kar/archidata/SqlWrapper.java
index b0e14f5..4f11e1d 100644
--- a/src/org/kar/archidata/SqlWrapper.java
+++ b/src/org/kar/archidata/SqlWrapper.java
@@ -395,7 +395,7 @@ public class SqlWrapper {
         return insert(data);
 	}
     
-	public static <T> void update(Class<T> clazz, long id, String jsonData) throws Exception {
+	public static <T> int update(Class<T> clazz, long id, String jsonData) throws Exception {
         ObjectMapper mapper = new ObjectMapper();
         // parse the object to be sure the data are valid:
         T data = mapper.readValue(jsonData, clazz);
@@ -404,10 +404,19 @@ public class SqlWrapper {
         List<String> keys = new ArrayList<>();
         Iterator<String> iterator = root.fieldNames();
         iterator.forEachRemaining(e -> keys.add(e));
-        update(data, id, keys);
+        return update(data, id, keys);
 	}
 	
-	public static <T> void update(T data, long id, List<String> filterValue) throws Exception {
+	/**
+	 * 
+	 * @param <T>
+	 * @param data
+	 * @param id
+	 * @param filterValue
+	 * @return the affected rows.
+	 * @throws Exception
+	 */
+	public static <T> int update(T data, long id, List<String> filterValue) throws Exception {
 		Class<?> clazz = data.getClass();
 		//public static NodeSmall createNode(String typeInNode, String name, String description, Long parentId) {
 		
@@ -515,14 +524,14 @@ public class SqlWrapper {
    		 	ps.setLong(iii++, id);
             // execute the request
             int affectedRows = ps.executeUpdate();
-            // todo manage the list of element is valid ...
-            //ps.execute();
+            return affectedRows;
         } catch (SQLException ex) {
             ex.printStackTrace();
         } finally {
         	entry.close();
         	entry = null;
         }
+        return 0;
 	}
 
 	static void addElement(PreparedStatement ps, Object value, int iii) throws Exception {
diff --git a/src/org/kar/archidata/db/DBEntry.java b/src/org/kar/archidata/db/DBEntry.java
index 7818d02..1c2ff7c 100644
--- a/src/org/kar/archidata/db/DBEntry.java
+++ b/src/org/kar/archidata/db/DBEntry.java
@@ -1,7 +1,5 @@
 package org.kar.archidata.db;
 
-import org.kar.archidata.model.User;
-
 import java.io.Closeable;
 import java.io.IOException;
 import java.sql.*;
@@ -10,16 +8,16 @@ public class DBEntry implements Closeable {
     public DBConfig config;
     public Connection connection;
 
-    public DBEntry(DBConfig config) {
+    public DBEntry(DBConfig config) throws IOException {
         this.config = config;
         connect();
     }
 
-    public void connect() {
+    public void connect() throws IOException {
         try {
             connection = DriverManager.getConnection(config.getUrl(), config.getLogin(), config.getPassword());
         } catch (SQLException ex) {
-            ex.printStackTrace();
+            throw new IOException("Connection db fail: " + ex.getMessage());
         }
 
     }
@@ -42,7 +40,7 @@ public class DBEntry implements Closeable {
             //connection.commit();
             connection.close();
         } catch (SQLException ex) {
-            ex.printStackTrace();
+            throw new IOException("Dis-connection db fail: " + ex.getMessage());
         }
 		
 	}
diff --git a/src/org/kar/archidata/model/GenericTable.java b/src/org/kar/archidata/model/GenericTable.java
index 8134c8e..41ab29c 100644
--- a/src/org/kar/archidata/model/GenericTable.java
+++ b/src/org/kar/archidata/model/GenericTable.java
@@ -26,10 +26,12 @@ public class GenericTable {
     @SQLCreateTime
     @SQLNotNull
     @SQLComment("Create time of the object")
+    @SQLDefault("now()")
 	public Timestamp create_date = null;
     @SQLNotRead
     @SQLUpdateTime
     @SQLNotNull
     @SQLComment("When update the object")
+    @SQLDefault("now()")
 	public Timestamp modify_date = null;
 }