diff --git a/Doctrine/Exception/Find.class.php b/Doctrine/Exception/Find.class.php
new file mode 100644
index 000000000..ed9f23ca1
--- /dev/null
+++ b/Doctrine/Exception/Find.class.php
@@ -0,0 +1,11 @@
+<?php
+Doctrine::autoload("Doctrine_Exception");
+/**
+ * thrown when user tries to find a Doctrine_Record for given primary key and that object is not found
+ */
+class Doctrine_Find_Exception extends Doctrine_Exception { 
+    public function __construct() {
+        parent::__construct("Couldn't find Data Access Object.",Doctrine::ERR_FIND);
+    }
+}
+?>
diff --git a/Doctrine/Exception/Mapping.class.php b/Doctrine/Exception/Mapping.class.php
new file mode 100644
index 000000000..7c63c4505
--- /dev/null
+++ b/Doctrine/Exception/Mapping.class.php
@@ -0,0 +1,11 @@
+<?php
+Doctrine::autoload("Doctrine_Exception");
+/**
+ * thrown when user tries to get a foreign key object but the mapping is not done right
+ */
+class Doctrine_Mapping_Exception extends Doctrine_Exception { 
+    public function __construct($message = "An error occured in the mapping logic.") {
+        parent::__construct($message,Doctrine::ERR_MAPPING);
+    }
+}
+?>
diff --git a/Doctrine/Exception/Naming.class.php b/Doctrine/Exception/Naming.class.php
new file mode 100644
index 000000000..a26fce4dd
--- /dev/null
+++ b/Doctrine/Exception/Naming.class.php
@@ -0,0 +1,12 @@
+<?php
+require_once(Doctrine::getPath().DIRECTORY_SEPARATOR."Exception.php");
+/**
+ * thrown when user defined Doctrine_Table is badly named
+ */
+class Doctrine_Naming_Exception extends Doctrine_Exception {
+    public function __construct() {
+        parent::__construct("Badly named Doctrine_Table. Each Doctrine_Table
+                             must be in format [Name]Table.", Doctrine::ERR_NAMING);
+    }
+}
+?>
diff --git a/Doctrine/Exception/PrimaryKey.class.php b/Doctrine/Exception/PrimaryKey.class.php
new file mode 100644
index 000000000..0e2e9014f
--- /dev/null
+++ b/Doctrine/Exception/PrimaryKey.class.php
@@ -0,0 +1,11 @@
+<?php
+Doctrine::autoload("Doctrine_Exception");
+/**
+ * thrown when Doctrine_Record is loaded and there is no primary key field
+ */
+class Doctrine_PrimaryKey_Exception extends Doctrine_Exception {
+    public function __construct() {
+        parent::__construct("No primary key column found. Each data set must have primary key column.", Doctrine::ERR_NO_PK);
+    }
+}
+?>