Added FAQ-entry for Xtext/Xtend

Author: Hendrik Winkelmann

lectures/acse/100_faq.md

@@ -13,6 +13,12 @@ Enable Java code completion in your preferences, otherwise, you may miss out on
    1. Choose "Java" > "Editor" > "Content Assist" > "Advanced".
    1. Enable "Java Proposals".
 
+## Xtext/Xtend
+#### The code generator is not called when saving the dsl-file
+Make sure that, in the Eclipse runtime started for the dsl, automatic building is activated. Activate it via "Project" > "Build Automatically".
+
+
+
 ## Spring
 
 #### Running multiple web applications simultaneously is not possible