Added manager classes for song metadata

include/database/artistRepository.h

@@ -0,0 +1,18 @@
+#ifndef ARTISTREPOSITORY_H_
+#define ARTISTREPOSITORY_H_
+
+#include "database/base_repository.h"
+#include "models/models.h"
+#include "types/coverFilter.h"
+
+namespace Database
+{
+    class artistRepository : public base_repository
+    {
+    public:
+        artistRepository(const Model::BinaryPath&);
+    private:
+    };
+}
+
+#endif