diff --git a/Makefile b/Makefile
index 3d4f7446..002f4201 100644
--- a/Makefile
+++ b/Makefile
@@ -53,6 +53,13 @@ document_test_cases: test_plantuml
 submodules:
 	git submodule update --init --recursive
 
+.PHONY: init_compile_commands
+init_compile_commands: debug
+	ln -sf debug/compile_commands.json compile_commands.json
+
+.PHONY: init
+	init: submodules init_compile_commands
+
 .PHONY: clang-format
 clang-format:
 	docker run --rm -v $(CURDIR):/root/sources bkryza/clang-format-check:1.2
diff --git a/src/puml/class_diagram_generator.h b/src/puml/class_diagram_generator.h
index 6199c2f6..08dd096a 100644
--- a/src/puml/class_diagram_generator.h
+++ b/src/puml/class_diagram_generator.h
@@ -40,12 +40,9 @@ namespace puml {
 using diagram_config = clanguml::config::class_diagram::diagram;
 using diagram_model = clanguml::model::class_diagram::diagram;
 using clanguml::model::class_diagram::class_;
-using clanguml::model::class_diagram::class_relationship;
-using clanguml::model::class_diagram::element;
 using clanguml::model::class_diagram::enum_;
 using clanguml::model::class_diagram::relationship_t;
 using clanguml::model::class_diagram::scope_t;
-using clanguml::visitor::class_diagram::tu_context;
 using namespace clanguml::util;
 
 std::string relative_to(std::string n, std::string c)