diff --git a/plugins/variability/org.eclipse.emf.henshin.variability.configuration/build.properties b/plugins/variability/org.eclipse.emf.henshin.variability.configuration/build.properties
index dbb5bc5..c16c43b 100644
--- a/plugins/variability/org.eclipse.emf.henshin.variability.configuration/build.properties
+++ b/plugins/variability/org.eclipse.emf.henshin.variability.configuration/build.properties
@@ -14,3 +14,4 @@
 jars.compile.order = .
 source.. = src/
 output.. = bin/
+custom = true
diff --git a/plugins/variability/org.eclipse.emf.henshin.variability/bak/Class2DB.henshin b/plugins/variability/org.eclipse.emf.henshin.variability/bak/Class2DB.henshin
deleted file mode 100644
index 49f5be3..0000000
--- a/plugins/variability/org.eclipse.emf.henshin.variability/bak/Class2DB.henshin
+++ /dev/null
@@ -1,89 +0,0 @@
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diff --git a/plugins/variability/org.eclipse.emf.henshin.variability/bak/Class2DB.henshin_diagram b/plugins/variability/org.eclipse.emf.henshin.variability/bak/Class2DB.henshin_diagram
deleted file mode 100644
index 453df75..0000000
--- a/plugins/variability/org.eclipse.emf.henshin.variability/bak/Class2DB.henshin_diagram
+++ /dev/null
@@ -1,165 +0,0 @@
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diff --git a/plugins/variability/org.eclipse.emf.henshin.variability/build.properties b/plugins/variability/org.eclipse.emf.henshin.variability/build.properties
index a263c2e..104047e 100644
--- a/plugins/variability/org.eclipse.emf.henshin.variability/build.properties
+++ b/plugins/variability/org.eclipse.emf.henshin.variability/build.properties
@@ -12,3 +12,4 @@
                lib/aima-core-3.0.0.jar
 source.. = src/
 output.. = bin/
+custom = true