diff --git a/tools/modelGenerator.php b/tools/modelGenerator.php
index 3eb86a7..f429325 100755
--- a/tools/modelGenerator.php
+++ b/tools/modelGenerator.php
@@ -35,10 +35,14 @@ class modelGenerator
   {
     $getopts = new \getopts ();
     $getopts->add ("Help", "?h", "help", "Help of the software");
-    $getopts->add ("DSN", "", "dsn:", "DSN - Data Source Name", "dsn");
-    $getopts->add ("Output", "o:", "output:", "Output directory", "dir");
+    $getopts->add ("DSN", "", "dsn:", "DSN - Data Source Name\n".
+                   "        Exemple : --dsn \"mysql:dbname=DBNAME\"",
+                   "dsn");
+    $getopts->add ("Output", "o:", "output:", 
+                   "Output directory, ./models by default", "dir");
     $getopts->add ("Namespace", "n:", "namespace:",
-                   "The namespace (if '', not added)", "namespaceName");
+                   "The namespace (if '', not added), models by default",
+                   "namespaceName");
     $getopts->add ("Username", "u:", "username:", "Username to connect",
                    "username");
     $getopts->add ("Password", "p:", "password:", "Password to connect",
@@ -64,9 +68,17 @@ class modelGenerator
     $this->dsn = $dsn;
     $this->modelsDir = $modelsDir;
     $this->namespaceName = $getopts->get ("Namespace");
-    $this->db = new \dblayeroo ($dsn,
-                                $getopts->get ("Username"),
-                                $getopts->get ("Password"));
+    try
+    {
+      $this->db = new \dblayeroo ($dsn,
+                                  $getopts->get ("Username"),
+                                  $getopts->get ("Password"));
+    }
+    catch (\Exception $e)
+    {
+      file_put_contents ("php://stderr", $e->getMessage ()."\n");
+      exit (3);
+    }
   }
 
   /** List all the existing tables in the database