diff --git a/Exit-Code-Mappings.md b/Exit-Code-Mappings.md
index cb21e74..6f20841 100644
--- a/Exit-Code-Mappings.md
+++ b/Exit-Code-Mappings.md
@@ -1 +1,47 @@
-# Exit Code Mappings
\ No newline at end of file
+# Exit Code Mappings
+
+For particular runtime environments ReCodEx can provide mappings of result codes to some custom messages. This is possible for example for Java or C# where there can be custom wrappers/runners which might catch exceptions and then provide users more detailed information about evaluations.
+
+## Java
+
+Runner: https://github.com/ReCodEx/utils/blob/master/runners/java/javarun.java
+
+| Exit Code | Exception | Mapping |
+| --------- | --------- | ------- |
+| 0 | --- | OK |
+| 1 | Throwable | Unknown error |
+| 2 | InvocationTargetException | Other invocation target exception |
+| 100 | OutOfMemoryError | Out of memory exception |
+| 101 | SecurityException | Security exception |
+| 102 | --- | Main class not found exception |
+| 104 | IllegalAccessException | Illegal access exception |
+| 105 | IllegalArgumentException | Illegal argument exception |
+| 106 | StackOverflowError | Stack overflow exception |
+| 107 | ArrayIndexOutOfBoundsException | Array index out of bounds exception |
+| 108 | IndexOutOfBoundsException | Index out of bounds exception |
+| 109 | NullPointerException | Null pointer exception |
+| 110 | ArithmeticException | Arithmetic exception |
+| 111 | OutOfMemoryError | Out of memory error |
+| 112 | SecurityException | Security exception |
+| 113 | IOException | IO exception |
+
+## C#
+
+Runner: https://github.com/ReCodEx/utils/blob/master/runners/cs/Wrapper.cs
+
+| Exit Code | Exception | Mapping |
+| --------- | --------- | ------- |
+| 0 | --- | OK |
+| 1 | --- | User error |
+| 101 | TargetInvocationException | Unhandled exception |
+| 102 | NullReferenceException | Null reference error |
+| 103 | OutOfMemoryException | Memory allocation error |
+| 104 | IndexOutOfRangeException | Index out of range error |
+| 105 | OverflowException | Overflow error |
+| 106 | IOException | IO error |
+| 107 | FileNotFoundException | File not found error |
+| 108 | InvalidOperationException | Invalid operation error |
+| 109 | DivideByZeroException | Division by zero error |
+| 200 | Exception | Internal error |
+| 201 | --- | No main method |
+| 202 | --- | More main methods |