diff --git a/libimagruby/src/error.rs b/libimagruby/src/error.rs
new file mode 100644
index 00000000..acd01d4e
--- /dev/null
+++ b/libimagruby/src/error.rs
@@ -0,0 +1,52 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; version
+// 2.1 of the License.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+use ruru::Class;
+
+class!(RImagError);
+class!(RImagObjDoesNotExistError);
+class!(RImagStoreError);
+class!(RImagStoreWriteError);
+class!(RImagStoreReadError);
+class!(RImagEntryError);
+class!(RImagEntryHeaderError);
+class!(RImagEntryHeaderReadError);
+class!(RImagEntryHeaderWriteError);
+class!(RImagTypeError);
+
+pub fn setup() {
+    let imag_error = Class::new("RImagError", Some(&Class::from_existing("RuntimeError")));
+    Class::new("RImagObjDoesNotExistError"  , Some(&imag_error));
+
+    {
+        let imag_store_error = Class::new("RImagStoreError", Some(&imag_error));
+        Class::new("RImagStoreWriteError", Some(&imag_store_error));
+        Class::new("RImagStoreReadError" , Some(&imag_store_error));
+    }
+
+    {
+        let imag_entry_error = Class::new("RImagEntryError"             , Some(&imag_error));
+        let imag_entry_header_error = Class::new("RImagEntryHeaderError", Some(&imag_entry_error));
+        Class::new("RImagEntryHeaderReadError" , Some(&imag_entry_header_error));
+        Class::new("RImagEntryHeaderWriteError", Some(&imag_entry_header_error));
+    }
+
+    Class::new("RImagTypeError", Some(&imag_error));
+}
+
diff --git a/libimagruby/src/lib.rs b/libimagruby/src/lib.rs
index 13d933b3..f26b6b1f 100644
--- a/libimagruby/src/lib.rs
+++ b/libimagruby/src/lib.rs
@@ -34,6 +34,7 @@ extern crate libimagrt;
 #[macro_use] pub mod store;
 mod cache;
 
+pub mod error;
 pub mod entry;
 pub mod imag;
 pub mod ruby_utils;
@@ -43,6 +44,7 @@ pub mod toml_utils;
 #[no_mangle]
 #[allow(non_snake_case)]
 pub extern fn Init_liblibimagruby() {
+    self::error::setup();
     self::store::setup();
     self::storeid::setup();
     self::entry::setup_filelockentry();