--- /dev/null
+#ifndef __UTIL_H__
+#define __UTIL_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+const char *get_data_file_path(const char *filename);
+GtkBuilder *new_builder_with_objects(char **object_ids);
+GObject *load_object(GtkBuilder *builder, const char *name);
+GtkUIManager *new_ui_manager(const char *filename);
+
+G_END_DECLS
+
+#endif /* __UTIL_H__ */