diff --git a/core/java/com/trustedlogic/trustednfc/android/internal/ErrorCodes.java b/core/java/com/trustedlogic/trustednfc/android/internal/ErrorCodes.java
new file mode 100644
index 0000000..ca3b7e0
--- /dev/null
+++ b/core/java/com/trustedlogic/trustednfc/android/internal/ErrorCodes.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * File            : ErrorCodes.java
+ * Original-Author : Trusted Logic S.A. (Sylvain Fonteneau)
+ * Created         : 26-02-2010
+ */
+
+package com.trustedlogic.trustednfc.android.internal;
+
+/**
+ * This class defines all the error codes that can be returned by the service
+ * and producing an exception on the application level. These are needed since
+ * binders does not support exceptions.
+ * 
+ * @hide
+ */
+public class ErrorCodes {
+
+    public static boolean isError(int code) {
+        if (code < 0) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public static final int SUCCESS = 0;
+    
+    public static final int ERROR_IO = -1;
+
+    public static final int ERROR_CANCELLED = -2;
+
+    public static final int ERROR_TIMEOUT = -3;
+
+    public static final int ERROR_BUSY = -4;
+
+    public static final int ERROR_CONNECT = -5;
+
+    public static final int ERROR_DISCONNECT = -5;
+
+    public static final int ERROR_READ = -6;
+
+    public static final int ERROR_WRITE = -7;
+
+    public static final int ERROR_INVALID_PARAM = -8;
+    
+    public static final int ERROR_INSUFFICIENT_RESOURCES = -9;
+    
+    public static final int ERROR_SOCKET_CREATION = -10;
+    
+    public static final int ERROR_SOCKET_NOT_CONNECTED = -11;
+    
+    public static final int ERROR_BUFFER_TO_SMALL = -12;
+
+    public static final int ERROR_SAP_USED = -13;
+    
+    public static final int ERROR_SERVICE_NAME_USED = -14;
+    
+    public static final int ERROR_SOCKET_OPTIONS = -15;
+    
+    public static final int ERROR_NFC_ON = -16;
+    
+    public static final int ERROR_NOT_INITIALIZED = -17;
+    
+    public static final int ERROR_SE_ALREADY_SELECTED = -18;
+    
+    public static final int ERROR_SE_CONNECTED = -19;
+    
+    public static final int ERROR_NO_SE_CONNECTED = -20;
+    
+    
+    
+    
+    
+    
+}