From cc83a0039b59d2317832bf7009989c5a227720f8 Mon Sep 17 00:00:00 2001
From: Peter van 't Hof <p.j.van_t_hof@lumc.nl>
Date: Tue, 22 Sep 2015 11:36:49 +0200
Subject: [PATCH] Added more to code style

---
 docs/developer/code-style.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/developer/code-style.md b/docs/developer/code-style.md
index 49ba7c52d..cf6e41731 100644
--- a/docs/developer/code-style.md
+++ b/docs/developer/code-style.md
@@ -1,4 +1,6 @@
 # Developer - Code style
 
 - Variable names should alway be in *camelcase* and do **not** start with a capital letter
-- Class names should alway be in *Camelcase* and do **always** start with a capital letter
\ No newline at end of file
+- Class names should alway be in *Camelcase* and do **always** start with a capital letter
+- Avoid using null, the Option type in scala can be used instead
+- If a method/value is designed to be overridden make it a `def` and override it with a `def`, do not use `val`
\ No newline at end of file
-- 
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