diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8f6589b..960e281 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -347,8 +347,18 @@ target_link_libraries(rhubarb-lib
 
 # ... rhubarb-logging
 add_library(rhubarb-logging
+	src/logging/Entry.cpp
+	src/logging/Entry.h
+	src/logging/Formatter.h
+	src/logging/formatters.cpp
+	src/logging/formatters.h
+	src/logging/Level.cpp
+	src/logging/Level.h
 	src/logging/logging.cpp
 	src/logging/logging.h
+	src/logging/Sink.h
+	src/logging/sinks.cpp
+	src/logging/sinks.h
 )
 target_include_directories(rhubarb-logging PUBLIC "src/logging")
 target_link_libraries(rhubarb-logging
diff --git a/src/logging/Entry.cpp b/src/logging/Entry.cpp
new file mode 100644
index 0000000..8772c7b
--- /dev/null
+++ b/src/logging/Entry.cpp
@@ -0,0 +1,38 @@
+#include "Entry.h"
+
+#include <thread>
+#include <mutex>
+#include <unordered_map>
+
+using std::lock_guard;
+using std::unordered_map;
+using std::string;
+
+namespace logging {
+
+	// Returns an int representing the current thread.
+	// This used to be a simple thread_local variable, but Xcode doesn't support that yet
+	int getThreadCounter() {
+		using thread_id = std::thread::id;
+
+		static std::mutex counterMutex;
+		lock_guard<std::mutex> lock(counterMutex);
+
+		static unordered_map<thread_id, int> threadCounters;
+		static int lastThreadId = 0;
+		thread_id threadId = std::this_thread::get_id();
+		if (threadCounters.find(threadId) == threadCounters.end()) {
+			threadCounters.insert({threadId, ++lastThreadId});
+		}
+		return threadCounters.find(threadId)->second;
+	}
+
+	Entry::Entry(Level level, const string& message) :
+		level(level),
+		message(message)
+	{
+		time(&timestamp);
+		this->threadCounter = getThreadCounter();
+	}
+
+}
diff --git a/src/logging/Entry.h b/src/logging/Entry.h
new file mode 100644
index 0000000..ff4961b
--- /dev/null
+++ b/src/logging/Entry.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "Level.h"
+
+namespace logging {
+	
+	struct Entry {
+		Entry(Level level, const std::string& message);
+
+		time_t timestamp;
+		int threadCounter;
+		Level level;
+		std::string message;
+	};
+
+}
diff --git a/src/logging/Formatter.h b/src/logging/Formatter.h
new file mode 100644
index 0000000..9393b66
--- /dev/null
+++ b/src/logging/Formatter.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <string>
+#include "Entry.h"
+
+namespace logging {
+
+	class Formatter {
+	public:
+		virtual ~Formatter() = default;
+		virtual std::string format(const Entry& entry) = 0;
+	};
+
+}
diff --git a/src/logging/Level.cpp b/src/logging/Level.cpp
new file mode 100644
index 0000000..ce4dfff
--- /dev/null
+++ b/src/logging/Level.cpp
@@ -0,0 +1,35 @@
+#include "Level.h"
+
+using std::string;
+
+namespace logging {
+
+	LevelConverter& LevelConverter::get() {
+		static LevelConverter converter;
+		return converter;
+	}
+
+	string LevelConverter::getTypeName() {
+		return "Level";
+	}
+
+	EnumConverter<Level>::member_data LevelConverter::getMemberData() {
+		return member_data{
+			{Level::Trace,		"Trace"},
+			{Level::Debug,		"Debug"},
+			{Level::Info,		"Info"},
+			{Level::Warn,		"Warn"},
+			{Level::Error,		"Error"},
+			{Level::Fatal,		"Fatal"}
+		};
+	}
+
+	std::ostream& operator<<(std::ostream& stream, Level value) {
+		return LevelConverter::get().write(stream, value);
+	}
+
+	std::istream& operator >> (std::istream& stream, Level& value) {
+		return LevelConverter::get().read(stream, value);
+	}
+
+}
diff --git a/src/logging/Level.h b/src/logging/Level.h
new file mode 100644
index 0000000..a487284
--- /dev/null
+++ b/src/logging/Level.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "EnumConverter.h"
+
+namespace logging {
+
+	enum class Level {
+		Trace,
+		Debug,
+		Info,
+		Warn,
+		Error,
+		Fatal,
+		EndSentinel
+	};
+
+	class LevelConverter : public EnumConverter<Level> {
+	public:
+		static LevelConverter& get();
+	protected:
+		std::string getTypeName() override;
+		member_data getMemberData() override;
+	};
+
+	std::ostream& operator<<(std::ostream& stream, Level value);
+
+	std::istream& operator >> (std::istream& stream, Level& value);
+
+}
diff --git a/src/logging/Sink.h b/src/logging/Sink.h
new file mode 100644
index 0000000..bfeafab
--- /dev/null
+++ b/src/logging/Sink.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include "Entry.h"
+
+namespace logging {
+
+	class Sink {
+	public:
+		virtual ~Sink() = default;
+		virtual void receive(const Entry& entry) = 0;
+	};
+
+}
diff --git a/src/logging/formatters.cpp b/src/logging/formatters.cpp
new file mode 100644
index 0000000..7447b35
--- /dev/null
+++ b/src/logging/formatters.cpp
@@ -0,0 +1,18 @@
+#include "formatters.h"
+#include <format.h>
+#include "Entry.h"
+#include "tools.h"
+
+using std::string;
+
+namespace logging {
+
+	string SimpleConsoleFormatter::format(const Entry& entry) {
+		return fmt::format("[{0}] {1}", entry.level, entry.message);
+	}
+
+	string SimpleFileFormatter::format(const Entry& entry) {
+		return fmt::format("[{0}] {1} {2}", formatTime(entry.timestamp, "%F %H:%M:%S"), entry.threadCounter, consoleFormatter.format(entry));
+	}
+
+}
diff --git a/src/logging/formatters.h b/src/logging/formatters.h
new file mode 100644
index 0000000..ca68fd2
--- /dev/null
+++ b/src/logging/formatters.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "Formatter.h"
+
+namespace logging {
+
+	class SimpleConsoleFormatter : public Formatter {
+	public:
+		std::string format(const Entry& entry) override;
+	};
+
+	class SimpleFileFormatter : public Formatter {
+	public:
+		std::string format(const Entry& entry) override;
+	private:
+		SimpleConsoleFormatter consoleFormatter;
+	};
+
+}
diff --git a/src/logging/logging.cpp b/src/logging/logging.cpp
index f5b95fd..d73496c 100644
--- a/src/logging/logging.cpp
+++ b/src/logging/logging.cpp
@@ -1,130 +1,13 @@
 #include "logging.h"
 #include <tools.h>
-#include <iostream>
-#include <atomic>
-#include <thread>
-#include <unordered_map>
+#include <mutex>
+#include "Entry.h"
 
 using namespace logging;
 using std::string;
 using std::vector;
 using std::shared_ptr;
 using std::lock_guard;
-using std::unordered_map;
-
-LevelConverter& LevelConverter::get() {
-	static LevelConverter converter;
-	return converter;
-}
-
-string LevelConverter::getTypeName() {
-	return "Level";
-}
-
-EnumConverter<Level>::member_data LevelConverter::getMemberData() {
-	return member_data {
-		{ Level::Trace,		"Trace" },
-		{ Level::Debug,		"Debug" },
-		{ Level::Info,		"Info" },
-		{ Level::Warn,		"Warn" },
-		{ Level::Error,		"Error" },
-		{ Level::Fatal,		"Fatal" }
-	};
-}
-
-std::ostream& logging::operator<<(std::ostream& stream, Level value) {
-	return LevelConverter::get().write(stream, value);
-}
-
-std::istream& logging::operator>>(std::istream& stream, Level& value) {
-	return LevelConverter::get().read(stream, value);
-}
-
-// Returns an int representing the current thread.
-// This used to be a simple thread_local variable, but Xcode doesn't support that yet
-int getThreadCounter() {
-    using thread_id = std::thread::id;
-
-    static std::mutex counterMutex;
-    lock_guard<std::mutex> lock(counterMutex);
-    
-    static unordered_map<thread_id, int> threadCounters;
-    static int lastThreadId = 0;
-    thread_id threadId = std::this_thread::get_id();
-    if (threadCounters.find(threadId) == threadCounters.end()) {
-        threadCounters.insert({threadId, ++lastThreadId});
-    }
-    return threadCounters.find(threadId)->second;
-}
-
-Entry::Entry(Level level, const string& message) :
-	level(level),
-	message(message)
-{
-	time(&timestamp);
-	this->threadCounter = getThreadCounter();
-}
-
-string SimpleConsoleFormatter::format(const Entry& entry) {
-	return fmt::format("[{0}] {1}", entry.level, entry.message);
-}
-
-string SimpleFileFormatter::format(const Entry& entry) {
-	return fmt::format("[{0}] {1} {2}", formatTime(entry.timestamp, "%F %H:%M:%S"), entry.threadCounter, consoleFormatter.format(entry));
-}
-
-LevelFilter::LevelFilter(shared_ptr<Sink> innerSink, Level minLevel) :
-	innerSink(innerSink),
-	minLevel(minLevel)
-{}
-
-void LevelFilter::receive(const Entry& entry) {
-	if (entry.level >= minLevel) {
-		innerSink->receive(entry);
-	}
-}
-
-StreamSink::StreamSink(shared_ptr<std::ostream> stream, shared_ptr<Formatter> formatter) :
-	stream(stream),
-	formatter(formatter)
-{}
-
-void StreamSink::receive(const Entry& entry) {
-	string line = formatter->format(entry);
-	*stream << line << std::endl;
-}
-
-StdErrSink::StdErrSink(shared_ptr<Formatter> formatter) :
-	StreamSink(std::shared_ptr<std::ostream>(&std::cerr, [](void*) {}), formatter)
-{}
-
-PausableSink::PausableSink(shared_ptr<Sink> innerSink) :
-	innerSink(innerSink)
-{}
-
-void PausableSink::receive(const Entry& entry) {
-	lock_guard<std::mutex> lock(mutex);
-	if (isPaused) {
-		buffer.push_back(entry);
-	} else {
-		innerSink->receive(entry);
-	}
-}
-
-void PausableSink::pause() {
-	lock_guard<std::mutex> lock(mutex);
-	isPaused = true;
-
-}
-
-void PausableSink::resume() {
-	lock_guard<std::mutex> lock(mutex);
-	isPaused = false;
-	for (const Entry& entry : buffer) {
-		innerSink->receive(entry);
-	}
-	buffer.clear();
-}
 
 std::mutex& getLogMutex() {
 	static std::mutex mutex;
diff --git a/src/logging/logging.h b/src/logging/logging.h
index 44d6240..b06c969 100644
--- a/src/logging/logging.h
+++ b/src/logging/logging.h
@@ -1,103 +1,11 @@
 #pragma once
 
-#include <vector>
-#include <mutex>
-#include "tools.h"
 #include "EnumConverter.h"
+#include "Sink.h"
+#include "Level.h"
 
 namespace logging {
 
-	enum class Level {
-		Trace,
-		Debug,
-		Info,
-		Warn,
-		Error,
-		Fatal,
-		EndSentinel
-	};
-
-	class LevelConverter : public EnumConverter<Level> {
-	public:
-		static LevelConverter& get();
-	protected:
-		std::string getTypeName() override;
-		member_data getMemberData() override;
-	};
-
-	std::ostream& operator<<(std::ostream& stream, Level value);
-
-	std::istream& operator>>(std::istream& stream, Level& value);
-
-	struct Entry {
-		Entry(Level level, const std::string& message);
-
-		time_t timestamp;
-		int threadCounter;
-		Level level;
-		std::string message;
-	};
-
-	class Formatter {
-	public:
-		virtual ~Formatter() = default;
-		virtual std::string format(const Entry& entry) = 0;
-	};
-
-	class SimpleConsoleFormatter : public Formatter {
-	public:
-		std::string format(const Entry& entry) override;
-	};
-
-	class SimpleFileFormatter : public Formatter {
-	public:
-		std::string format(const Entry& entry) override;
-	private:
-		SimpleConsoleFormatter consoleFormatter;
-	};
-
-	class Sink {
-	public:
-		virtual ~Sink() = default;
-		virtual void receive(const Entry& entry) = 0;
-	};
-
-	class LevelFilter : public Sink {
-	public:
-		LevelFilter(std::shared_ptr<Sink> innerSink, Level minLevel);
-		void receive(const Entry& entry) override;
-	private:
-		std::shared_ptr<Sink> innerSink;
-		Level minLevel;
-	};
-
-	class StreamSink : public Sink {
-	public:
-		StreamSink(std::shared_ptr<std::ostream> stream, std::shared_ptr<Formatter> formatter);
-		void receive(const Entry& entry) override;
-	private:
-		std::shared_ptr<std::ostream> stream;
-		std::shared_ptr<Formatter> formatter;
-	};
-
-	class StdErrSink : public StreamSink {
-	public:
-		explicit StdErrSink(std::shared_ptr<Formatter> formatter);
-	};
-
-	class PausableSink : public Sink {
-	public:
-		explicit PausableSink(std::shared_ptr<Sink> innerSink);
-		void receive(const Entry& entry) override;
-		void pause();
-		void resume();
-	private:
-		std::shared_ptr<Sink> innerSink;
-		std::vector<Entry> buffer;
-		std::mutex mutex;
-		bool isPaused = false;
-	};
-
 	void addSink(std::shared_ptr<Sink> sink);
 
 	void log(Level level, const std::string& message);
diff --git a/src/logging/sinks.cpp b/src/logging/sinks.cpp
new file mode 100644
index 0000000..a2be5cf
--- /dev/null
+++ b/src/logging/sinks.cpp
@@ -0,0 +1,64 @@
+#include "sinks.h"
+#include <iostream>
+#include "Entry.h"
+
+using std::string;
+using std::lock_guard;
+using std::shared_ptr;
+
+namespace logging {
+
+	LevelFilter::LevelFilter(shared_ptr<Sink> innerSink, Level minLevel) :
+		innerSink(innerSink),
+		minLevel(minLevel)
+	{}
+
+	void LevelFilter::receive(const Entry& entry) {
+		if (entry.level >= minLevel) {
+			innerSink->receive(entry);
+		}
+	}
+
+	StreamSink::StreamSink(shared_ptr<std::ostream> stream, shared_ptr<Formatter> formatter) :
+		stream(stream),
+		formatter(formatter)
+	{}
+
+	void StreamSink::receive(const Entry& entry) {
+		string line = formatter->format(entry);
+		*stream << line << std::endl;
+	}
+
+	StdErrSink::StdErrSink(shared_ptr<Formatter> formatter) :
+		StreamSink(std::shared_ptr<std::ostream>(&std::cerr, [](void*) {}), formatter)
+	{}
+
+	PausableSink::PausableSink(shared_ptr<Sink> innerSink) :
+		innerSink(innerSink)
+	{}
+
+	void PausableSink::receive(const Entry& entry) {
+		lock_guard<std::mutex> lock(mutex);
+		if (isPaused) {
+			buffer.push_back(entry);
+		} else {
+			innerSink->receive(entry);
+		}
+	}
+
+	void PausableSink::pause() {
+		lock_guard<std::mutex> lock(mutex);
+		isPaused = true;
+
+	}
+
+	void PausableSink::resume() {
+		lock_guard<std::mutex> lock(mutex);
+		isPaused = false;
+		for (const Entry& entry : buffer) {
+			innerSink->receive(entry);
+		}
+		buffer.clear();
+	}
+
+}
diff --git a/src/logging/sinks.h b/src/logging/sinks.h
new file mode 100644
index 0000000..460be40
--- /dev/null
+++ b/src/logging/sinks.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include "Sink.h"
+#include <memory>
+#include "Formatter.h"
+#include <vector>
+#include <mutex>
+
+namespace logging {
+	enum class Level;
+
+	class LevelFilter : public Sink {
+	public:
+		LevelFilter(std::shared_ptr<Sink> innerSink, Level minLevel);
+		void receive(const Entry& entry) override;
+	private:
+		std::shared_ptr<Sink> innerSink;
+		Level minLevel;
+	};
+
+	class StreamSink : public Sink {
+	public:
+		StreamSink(std::shared_ptr<std::ostream> stream, std::shared_ptr<Formatter> formatter);
+		void receive(const Entry& entry) override;
+	private:
+		std::shared_ptr<std::ostream> stream;
+		std::shared_ptr<Formatter> formatter;
+	};
+
+	class StdErrSink : public StreamSink {
+	public:
+		explicit StdErrSink(std::shared_ptr<Formatter> formatter);
+	};
+
+	class PausableSink : public Sink {
+	public:
+		explicit PausableSink(std::shared_ptr<Sink> innerSink);
+		void receive(const Entry& entry) override;
+		void pause();
+		void resume();
+	private:
+		std::shared_ptr<Sink> innerSink;
+		std::vector<Entry> buffer;
+		std::mutex mutex;
+		bool isPaused = false;
+	};
+
+}
diff --git a/src/main.cpp b/src/main.cpp
index 6bf0d6a..c4c23a2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,6 +5,8 @@
 #include "NiceCmdLineOutput.h"
 #include "ProgressBar.h"
 #include "logging.h"
+#include "sinks.h"
+#include "formatters.h"
 #include <gsl_util.h>
 #include "Exporter.h"
 #include "ContinuousTimeline.h"