Apply modernize-use-override

test/device/_config.cxx

@@ -72,7 +72,7 @@ class TestDevice : public FairMQDevice
     TestDevice& operator=(const TestDevice&) = delete;
     TestDevice& operator=(TestDevice&&) = delete;
 
-    ~TestDevice()
+    ~TestDevice() override
     {
         WaitForState(fair::mq::State::Running);
         ChangeState(fair::mq::Transition::Stop);

test/device/_error_state.cxx

@@ -49,7 +49,7 @@ class BadDevice : public FairMQDevice
     BadDevice& operator=(const BadDevice&) = delete;
     BadDevice& operator=(BadDevice&&) = delete;
 
-    ~BadDevice()
+    ~BadDevice() override
     {
         ChangeState(fair::mq::Transition::ResetDevice);
 

test/device/_transitions.cxx

@@ -26,7 +26,7 @@ class SlowDevice : public FairMQDevice
     SlowDevice() = default;
 
   protected:
-    void Init()
+    void Init() override
     {
         this_thread::sleep_for(chrono::milliseconds(100));
     }