diff --git a/CMakeLists.txt b/CMakeLists.txt
index e10c9f5..92d808e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,11 @@
 cmake_minimum_required(VERSION 3.10)
 set(CMAKE_CXX_STANDARD 17)
 
-set(CMAKE_CXX_CLANG_TIDY clang-tidy -checks=-*,bugprone-*,concurrency-*,cppcoreguidelines-*,modernize-*,performance-*,readability-*,)
+set(
+    CMAKE_CXX_CLANG_TIDY
+    clang-tidy
+    -checks=-*,bugprone-*,concurrency-*,cppcoreguidelines-*,modernize-*,performance-*,readability-*,-modernize-use-trailing-return-type
+)
 
 project(JAMCS)
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 907d319..ec1a5a8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,4 @@
+add_subdirectory(logger)
 add_subdirectory(ui)
 
 add_executable(
@@ -9,6 +10,7 @@ target_link_libraries(
     JAMCS
     PRIVATE
     UI
+    Logger
 )
 
 add_definitions (${GTK_CFLAGS_OTHER})
diff --git a/src/README.md b/src/README.md
new file mode 100644
index 0000000..191a738
--- /dev/null
+++ b/src/README.md
@@ -0,0 +1,17 @@
+## JAMCS
+JAMCS is separated into components which take care of individual functions of the JAMCS software:
+- Core
+    - Core object which holds references to the different components, used to talk between components
+- UI
+    - Sets up the UI for display on the camera, i.e. viewfinder, gallery
+- Camera
+    - Handles connecting to and controlling the physical camera device
+- Processing
+    - Handles the images once a picture has been taken:
+        - Applies any image effects
+        - Saves the image to disk
+        - Uploads the image to a cloud service
+- Web UI
+    - Runs the Web UI for JAMCS, allowing the entire app to be controlled remotely
+- Logger
+    - Handles logging output to the console or a file
diff --git a/src/core/core.h b/src/core/core.h
new file mode 100644
index 0000000..27d43d3
--- /dev/null
+++ b/src/core/core.h
@@ -0,0 +1,17 @@
+// Header only core which has references to the instances of classes
+#ifndef _CORE_H
+#define _CORE_H
+
+#include <gtkmm.h>
+#include <memory>
+
+#include "../logger/logger.h"
+
+class Core
+{
+public:
+    Glib::RefPtr<Gtk::Application> app;
+    std::unique_ptr<Logger> logger;
+};
+
+#endif // _CORE_H
diff --git a/src/logger/CMakeLists.txt b/src/logger/CMakeLists.txt
new file mode 100644
index 0000000..4d527cc
--- /dev/null
+++ b/src/logger/CMakeLists.txt
@@ -0,0 +1,5 @@
+add_library(
+    Logger
+    STATIC
+    logger.cpp
+)
diff --git a/src/logger/logger.cpp b/src/logger/logger.cpp
new file mode 100644
index 0000000..e69d260
--- /dev/null
+++ b/src/logger/logger.cpp
@@ -0,0 +1,43 @@
+#include "logger.h"
+
+#include <iostream>
+
+Logger::Logger(LogLevel logLevel)
+{
+    this->SetLogLevel(logLevel);
+}
+
+void Logger::SetLogLevel(LogLevel logLevel)
+{
+    this->level = logLevel;
+}
+
+void Logger::Log(std::wstring msg, LogLevel msgLevel)
+{
+    // Check if the log level matches
+    if (msgLevel <= this->level)
+    {
+        // For now just print
+        std::wcout << msgLevel << L" : " << msg << std::endl;
+    }
+}
+
+void Logger::Debug(std::wstring msg)
+{
+    this->Log(msg, LogLevel::DEBUG);
+}
+
+void Logger::Info(std::wstring msg)
+{
+    this->Log(msg, LogLevel::INFO);
+}
+
+void Logger::Error(std::wstring msg)
+{
+    this->Log(msg, LogLevel::ERROR);
+}
+
+void Logger::Critical(std::wstring msg)
+{
+    this->Log(msg, LogLevel::CRITICAL);
+}
diff --git a/src/logger/logger.h b/src/logger/logger.h
new file mode 100644
index 0000000..dca83bb
--- /dev/null
+++ b/src/logger/logger.h
@@ -0,0 +1,29 @@
+#ifndef _LOGGER_H
+#define _LOGGER_H
+
+#include <string>
+
+enum LogLevel
+{
+    DEBUG,
+    INFO,
+    ERROR,
+    CRITICAL
+};
+
+class Logger
+{
+private:
+    LogLevel level;
+    void Log(std::wstring msg, LogLevel msgLevel);
+
+public:
+    Logger(LogLevel logLevel = LogLevel::INFO);
+    void SetLogLevel(LogLevel logLevel);
+    void Debug(std::wstring msg);
+    void Info(std::wstring msg);
+    void Error(std::wstring msg);
+    void Critical(std::wstring msg);
+};
+
+#endif // _LOGGER_H
diff --git a/src/main.cpp b/src/main.cpp
index dc47c7f..29b441e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,8 @@
 #include <gtkmm.h>
 #include <iostream>
 
+#include "core/core.h"
+#include "logger/logger.h"
 #include "ui/jamcswindow.h"
 
 // Default size for JAMCS window
@@ -10,10 +12,17 @@ const static int DEFAULT_WINDOW_HEIGHT = 480;
 
 int main(int argc, char* argv[])
 {
-  auto app = Gtk::Application::create("org.gtkmm.examples.base");
+  auto core = std::make_shared<Core>(Core());
+  core->logger = std::make_unique<Logger>(Logger());
 
-  JamcsWindow window(app, "JAMCS", DEFAULT_WINDOW_WIDTH, DEFAULT_WINDOW_HEIGHT);
+  core->logger->Info(L"Starting JAMCS");
+
+  // Create camera object and pass to core
+
+  core->app = Gtk::Application::create("org.gtkmm.examples.base");
+
+  JamcsWindow window(core, "JAMCS", DEFAULT_WINDOW_WIDTH, DEFAULT_WINDOW_HEIGHT);
   window.show_all();
 
-  return app->run(window);
+  return core->app->run(window);
 }
diff --git a/src/ui/CMakeLists.txt b/src/ui/CMakeLists.txt
index 5c928ca..d31e742 100644
--- a/src/ui/CMakeLists.txt
+++ b/src/ui/CMakeLists.txt
@@ -1,13 +1,14 @@
 add_subdirectory(common)
+add_subdirectory(viewfinder)
 
 add_library(
     UI
     STATIC
     jamcswindow.cpp
-    viewfinder.cpp
 )
 target_link_libraries(
     UI
     PUBLIC
     CommonUI
+    Viewfinder
 )
diff --git a/src/ui/README.md b/src/ui/README.md
new file mode 100644
index 0000000..6669824
--- /dev/null
+++ b/src/ui/README.md
@@ -0,0 +1,2 @@
+## UI
+This directory contains the code defining the camera UI.
diff --git a/src/ui/common/README.md b/src/ui/common/README.md
new file mode 100644
index 0000000..67824d4
--- /dev/null
+++ b/src/ui/common/README.md
@@ -0,0 +1,2 @@
+## Common
+Common UI elements used across multiple screens
diff --git a/src/ui/common/closebutton.cpp b/src/ui/common/closebutton.cpp
index 2102393..5e8554d 100644
--- a/src/ui/common/closebutton.cpp
+++ b/src/ui/common/closebutton.cpp
@@ -2,7 +2,7 @@
 
 #include <gtkmm.h>
 
-CloseButton::CloseButton(const Glib::ustring &label, Glib::RefPtr<Gtk::Application> appPtr) : app(appPtr)
+CloseButton::CloseButton(std::shared_ptr<Core> appCore, const Glib::ustring &label) : core(appCore)
 {
   set_label(label);
 
@@ -11,5 +11,5 @@ CloseButton::CloseButton(const Glib::ustring &label, Glib::RefPtr<Gtk::Applicati
 
 void CloseButton::on_button_clicked()
 {
-  this->app.get()->quit();
+  this->core->app.get()->quit();
 }
diff --git a/src/ui/common/closebutton.h b/src/ui/common/closebutton.h
index bf9d68d..abedae5 100644
--- a/src/ui/common/closebutton.h
+++ b/src/ui/common/closebutton.h
@@ -2,14 +2,17 @@
 #define _CLOSEBUTTON_H
 
 #include <gtkmm.h>
+#include <memory>
+
+#include "../../core/core.h"
 
 class CloseButton : public Gtk::Button
 {
 private:
   void on_button_clicked();
-  Glib::RefPtr<Gtk::Application> app;
+  std::shared_ptr<Core> core;
 public:
-  CloseButton(const Glib::ustring &label, Glib::RefPtr<Gtk::Application> appPtr);
+  CloseButton(std::shared_ptr<Core> appCore, const Glib::ustring &label);
 };
 
 #endif // _CLOSEBUTTON_H
diff --git a/src/ui/jamcswindow.cpp b/src/ui/jamcswindow.cpp
index c60760c..dcee267 100644
--- a/src/ui/jamcswindow.cpp
+++ b/src/ui/jamcswindow.cpp
@@ -2,17 +2,20 @@
 
 #include <gtkmm.h>
 
-#include "viewfinder.h"
+#include "../core/core.h"
+#include "viewfinder/viewfinder.h"
 
-JamcsWindow::JamcsWindow(Glib::RefPtr<Gtk::Application> appPtr, const Glib::ustring &title, int width, int height) : app(appPtr)
+JamcsWindow::JamcsWindow(std::shared_ptr<Core> appCore, const Glib::ustring &title, int width, int height) : core(appCore)
 {
+    this->core->logger->Info(L"Initializing UI");
+
     set_title(title);
     set_default_size(width, height);
 
-    this->viewfinder = std::unique_ptr<Viewfinder>(new Viewfinder(app));
+    this->viewfinder = std::make_unique<Viewfinder>(Viewfinder(this->core));
     this->stack.add(*this->viewfinder, "viewfinder");
 
     this->stack.set_visible_child("viewfinder");
 
     this->add(this->stack);
-}
+};
diff --git a/src/ui/jamcswindow.h b/src/ui/jamcswindow.h
index 1b4ebce..d5ca140 100644
--- a/src/ui/jamcswindow.h
+++ b/src/ui/jamcswindow.h
@@ -4,16 +4,17 @@
 #include <gtkmm.h>
 #include <memory.h>
 
-#include "viewfinder.h"
+#include "../core/core.h"
+#include "viewfinder/viewfinder.h"
 
 class JamcsWindow : public Gtk::Window
 {
 private:
-    Glib::RefPtr<Gtk::Application> app;
     Gtk::Stack stack;
+    std::shared_ptr<Core> core = nullptr;
     std::unique_ptr<Viewfinder> viewfinder = nullptr;
 public:
-    JamcsWindow(Glib::RefPtr<Gtk::Application> appPtr, const Glib::ustring &title, int width, int height);
+    JamcsWindow(std::shared_ptr<Core> appCore, const Glib::ustring &title, int width, int height);
 };
 
 #endif // _WINDOW_H
diff --git a/src/ui/viewfinder.cpp b/src/ui/viewfinder.cpp
deleted file mode 100644
index 4788465..0000000
--- a/src/ui/viewfinder.cpp
+++ /dev/null
@@ -1,11 +0,0 @@
-#include "viewfinder.h"
-
-#include "common/common.h"
-
-Viewfinder::Viewfinder(Glib::RefPtr<Gtk::Application> appPtr) : app(appPtr)
-{
-    this->close_button = std::unique_ptr<CloseButton>(new CloseButton("X", app));
-    this->add(*this->close_button);
-
-    this->show_all();
-}
diff --git a/src/ui/viewfinder/CMakeLists.txt b/src/ui/viewfinder/CMakeLists.txt
new file mode 100644
index 0000000..5fe4d54
--- /dev/null
+++ b/src/ui/viewfinder/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_library(
+    Viewfinder
+    STATIC
+    viewfinder.cpp
+)
+target_link_libraries(
+    Viewfinder
+    PUBLIC
+    CommonUI
+)
diff --git a/src/ui/viewfinder/README.md b/src/ui/viewfinder/README.md
new file mode 100644
index 0000000..e82a37b
--- /dev/null
+++ b/src/ui/viewfinder/README.md
@@ -0,0 +1,2 @@
+## Viewfinder
+Main viewfinder screen used to take pictures and videos.
diff --git a/src/ui/viewfinder/viewfinder.cpp b/src/ui/viewfinder/viewfinder.cpp
new file mode 100644
index 0000000..8265b3e
--- /dev/null
+++ b/src/ui/viewfinder/viewfinder.cpp
@@ -0,0 +1,14 @@
+#include "viewfinder.h"
+
+#include <memory>
+
+#include "../../core/core.h"
+#include "../common/common.h"
+
+Viewfinder::Viewfinder(std::shared_ptr<Core> appCore) : core(appCore)
+{
+    this->close_button = std::unique_ptr<CloseButton>(new CloseButton(this->core, "X"));
+    this->add(*this->close_button);
+
+    this->show_all();
+}
diff --git a/src/ui/viewfinder.h b/src/ui/viewfinder/viewfinder.h
similarity index 59%
rename from src/ui/viewfinder.h
rename to src/ui/viewfinder/viewfinder.h
index 8293e8c..cefc29b 100644
--- a/src/ui/viewfinder.h
+++ b/src/ui/viewfinder/viewfinder.h
@@ -3,15 +3,16 @@
 
 #include <gtkmm.h>
 
-#include "common/common.h"
+#include "../common/common.h"
+#include "../../core/core.h"
 
 class Viewfinder : public Gtk::Box
 {
 private:
-    Glib::RefPtr<Gtk::Application> app;
+    std::shared_ptr<Core> core;
     std::unique_ptr<CloseButton> close_button = nullptr;
 public:
-    Viewfinder(Glib::RefPtr<Gtk::Application> appPtr);
+    Viewfinder(std::shared_ptr<Core> appCore);
 };
 
 #endif // _VIEWFINDER_H