--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Logger.h	Mon Jan 04 15:45:12 2021 +0100
@@ -0,0 +1,44 @@
+/**
+ * DJM-Fix
+ * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <iostream>
+
+namespace djmfix {
+namespace logging {
+
+enum class Level {
+	SEVERE,
+	WARNING,
+	INFO,
+	CONFIG,
+	FINE,
+	FINER,
+	FINEST,
+};
+
+class Logger {
+public:
+	virtual ~Logger() = default;
+	virtual void log(Level level, const std::string& message) = 0;
+};
+
+Logger* create(std::ostream& output, Level minLevel);
+Logger* blackhole();
+
+}
+}
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