Fixed clang-tidy warnings

src/common/model/diagram_element.h

@@ -43,7 +43,7 @@ public:
 
     diagram_element();
 
-    virtual ~diagram_element() = default;
+    ~diagram_element() override = default;
 
     /**
      * @brief Returns diagram element id.

src/common/model/diagram_filter.cc

@@ -251,8 +251,8 @@ tvl::value_t namespace_filter::match(const diagram &d, const element &e) const
                     if (is_inclusive)
                         return e_ns.starts_with(nsit_ns) ||
                             nsit_ns.starts_with(e_ns) || e_ns == nsit_ns;
-                    else
-                        return e_ns.starts_with(nsit_ns) || e_ns == nsit_ns;
+
+                    return e_ns.starts_with(nsit_ns) || e_ns == nsit_ns;
                 }
 
                 return std::get<common::regex>(nsit.value()) %=

src/common/model/relationship.h

@@ -52,7 +52,7 @@ public:
         std::string multiplicity_source = "",
         std::string multiplicity_destination = "");
 
-    virtual ~relationship() = default;
+    ~relationship() override = default;
 
     /**
      * Set the type of relatinoship.