Developer.md

+# First steps
+
+Clone our git repository:
+
+```
+git clone git@bitbucket.org:lnahabedian/mtsa.git
+```
+
+Please create a new branch to start your contribution.
+
+```
+git branch -b <name of your branch>
+```
+
+## Maven
+Install and use [Maven](https://maven.apache.org/) to compile the code. 
+
+It is suggested to first clean all the generated code and sources and then compile or install. 
+Note that _compile_ will not generate the jar file to execute. Use _install_ to compile and generate the JAR file.
+
+To run you can just use the _exec:java_ command.
+
+```maven
+#!maven
+
+mvn clean
+mvn install
+mvn exec:java
+```
+
+---
+[Output Messages](devs/outputmessages)
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