diff --git a/.gitignore b/.gitignore
index 620d3dc..974f0cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,9 @@
 *.lai
 *.la
 *.a
+
+# YCM files
+*.ycm*
+
+# Syntastic files
+*.syntastic_cpp_config
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4781c61..377fbbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,10 +21,11 @@ endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 include_directories(${SFML_INCLUDE_DIR})
 include_directories(./include)
 
+# Direct that an execuable tetrisplosion should be built using main.cxx)
+add_executable(tetrisplosion src/main.cxx)
+
 # List of subdirectories to run cmake on
 add_subdirectory(lib)
 add_subdirectory(extlibs)  # managing all external libraries.
 
-# Direct that an execuable tetrisplosion should be built using main.cxx)
-add_executable(tetrisplosion src/main.cxx)
 target_link_libraries(tetrisplosion tetrisplosion_lib)
diff --git a/include/event/event.hpp b/include/event/event.hpp
new file mode 100644
index 0000000..a162126
--- /dev/null
+++ b/include/event/event.hpp
@@ -0,0 +1,10 @@
+#ifndef EVENT_EVENT_HPP_
+#define EVENT_EVENT_HPP_
+#include <SFML/Window/Event.hpp>
+namespace event {
+  struct Event {
+    sf::Event event_; 
+  };
+}  // namespace event
+
+#endif  // EVENT_EVENT_HPP_
diff --git a/include/event/filter-inl.hpp b/include/event/filter-inl.hpp
new file mode 100644
index 0000000..5826109
--- /dev/null
+++ b/include/event/filter-inl.hpp
@@ -0,0 +1,36 @@
+#ifndef EVENT_FILTER_INL_HPP_
+#define EVENT_FILTER_INL_HPP_
+#include <event/filter_source.hpp>
+#include <event/handle.hpp>
+
+using sf::Event::EventType;
+using std::function;
+
+namespace event {
+//===----------------------------------------------------------------------===//
+// Filter
+//===----------------------------------------------------------------------===//
+template<typename EventType>
+Filter::Filter(HandleFactory const& hf) : handle_factory_(hf) {
+}
+
+template<typename EventType>
+Handle Filter::register(void) {
+  return handle_factory_.build();
+}
+
+template<typename EventType>
+void Filter::unregister(Handle const handle) {
+  // TODO(@anyone) implement.
+}
+
+template<typename EventType>
+bool Filter::send_events(std::vector<Event> const events) const {
+  for (auto const& event : events) {
+    // TODO(@anyone) implement
+  }
+  return false;
+}
+}  // namespace event
+
+#endif  // EVENT_FILTER_INL_HPP_
diff --git a/include/event/filter.hpp b/include/event/filter.hpp
new file mode 100644
index 0000000..444e678
--- /dev/null
+++ b/include/event/filter.hpp
@@ -0,0 +1,26 @@
+#ifndef EVENT_FILTER_HPP_
+#define EVENT_FILTER_HPP_
+#include "handle.hpp"
+#include "event.hpp"
+#include <vector>
+namespace event {
+struct HandleFactory;
+
+struct Filter {
+  virtual ~Filter(void) { }
+  virtual bool send_events(std::vector<Event> const events) const = 0;
+};
+
+template<typename EventType>
+struct EventFilter : public Filter {
+  EventFilter(HandleFactory const& hf);
+  Handle register_filter(void);
+  void unregister(Handle const handle);
+  bool send_events(std::vector<Event> const events) const;
+ private:
+  HandleFactory const& handle_factory_;
+  std::vector<Handle> handles_;
+};
+
+}  // namespace event
+#endif // EVENT_FILTER_HPP_
diff --git a/include/event/handle.hpp b/include/event/handle.hpp
new file mode 100644
index 0000000..da65bae
--- /dev/null
+++ b/include/event/handle.hpp
@@ -0,0 +1,20 @@
+#ifndef EVENT_HANDLE_HPP_
+#define EVENT_HANDLE_HPP_
+#include <cstdint>
+
+namespace event {
+class Handle {
+  friend class HandleFactory;
+  explicit Handle(uint64_t const id);
+  uint64_t const id_;
+};
+
+struct HandleFactory {
+  HandleFactory(void);
+  Handle Build(void);
+ private:
+  uint64_t index_;
+};
+}  // namespace event_
+
+#endif  // EVENT_HANDLE_HPP_
diff --git a/include/event/system.hpp b/include/event/system.hpp
new file mode 100644
index 0000000..7c6113f
--- /dev/null
+++ b/include/event/system.hpp
@@ -0,0 +1,28 @@
+#ifndef EVENT_SYSTEM_HPP_ 
+#define EVENT_SYSTEM_HPP_
+#include "handle.hpp"
+#include "filter.hpp"
+#include <vector>
+
+namespace sf {
+class Window;
+}  // namespace sf
+
+namespace event {
+struct System {
+  virtual void add_filter(Filter &&f) = 0;
+  virtual void enumerate(void) const = 0;
+};
+
+struct SfmlSystem : public System {
+  SfmlSystem(sf::Window &window);
+  virtual void add_filter(Filter &&f) override;
+  virtual void enumerate(void) const override;
+ private:
+  sf::Window &window_;
+  std::vector<Filter> filters_;
+};
+
+}  // namespace event
+
+#endif  // EVENT_SYSTEM_HPP_
diff --git a/include/test_include.hpp b/include/test_include.hpp
deleted file mode 100644
index 0f6cb37..0000000
--- a/include/test_include.hpp
+++ /dev/null
@@ -1 +0,0 @@
-void test_fn(void);
diff --git a/include/tetrisplosion.hpp b/include/tetrisplosion.hpp
index 3896de5..9bf7f89 100644
--- a/include/tetrisplosion.hpp
+++ b/include/tetrisplosion.hpp
@@ -1,14 +1,20 @@
 #ifndef TETRISPLOSION_HPP_
 #define TETRISPLOSION_HPP_
 
+#include <SFML/Graphics.hpp>
+#include <event/system.hpp>
+
 namespace tet {
 struct WindowConfig;
 struct MenuConfig;
 struct Tetrisplosion {
   Tetrisplosion(WindowConfig const& wc, MenuConfig const& mc);
+  int run(void);
  private:
-  WindowConfig const& wc_;
+  //WindowConfig const& wc_;
   MenuConfig const& mc_;
+  sf::RenderWindow window_;
+  event::SfmlSystem event_system_;
 };
 
 }  // namespace tet
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index d706f4d..d44482a 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -4,9 +4,12 @@ set (SRCROOT ${PROJECT_SOURCE_DIR}/lib)
 set(SRC
   ${SRCROOT}/tetrisplosion.cxx
   ${SRCROOT}/window_config.cxx
-  ${SRCROOT}/test_lib.cxx
   )
 source_group("" FILES ${SRC})
 add_library(tetrisplosion_lib ${SRC})
+
+add_subdirectory(event)
+target_link_libraries(tetrisplosion_lib event_lib)
+
 find_package(SFML 2.1 COMPONENTS system window graphics network audio REQUIRED)
 target_link_libraries(tetrisplosion_lib ${SFML_LIBRARIES})
diff --git a/lib/event/CMakeLists.txt b/lib/event/CMakeLists.txt
new file mode 100644
index 0000000..e6a354a
--- /dev/null
+++ b/lib/event/CMakeLists.txt
@@ -0,0 +1,10 @@
+set (SRCROOT ${PROJECT_SOURCE_DIR}/lib/event)
+
+# list of source files
+set(SRC
+  ${SRCROOT}/event.cxx
+  ${SRCROOT}/handle.cxx
+  ${SRCROOT}/system.cxx
+  )
+source_group("" FILES ${SRC})
+add_library(event_lib ${SRC})
diff --git a/lib/event/event.cxx b/lib/event/event.cxx
new file mode 100644
index 0000000..da73973
--- /dev/null
+++ b/lib/event/event.cxx
@@ -0,0 +1,8 @@
+#include <event/event.hpp>
+#include <stdexcept>
+
+using Event = sf::Event::EventType;
+
+namespace event {
+
+}  // namespace event
diff --git a/lib/event/handle.cxx b/lib/event/handle.cxx
new file mode 100644
index 0000000..6be2d9c
--- /dev/null
+++ b/lib/event/handle.cxx
@@ -0,0 +1,20 @@
+#include <event/handle.hpp>
+#include <cstdint>
+
+namespace event {
+//===----------------------------------------------------------------------===//
+// Handle
+//===----------------------------------------------------------------------===//
+Handle::Handle(uint64_t const id) : id_(id) {
+}
+
+//===----------------------------------------------------------------------===//
+// HandleFactory
+//===----------------------------------------------------------------------===//
+HandleFactory::HandleFactory(void) : index_(0U) {
+}
+
+Handle HandleFactory::Build(void) {
+  return Handle(index_++);
+}
+}  // namespace event
diff --git a/lib/event/system.cxx b/lib/event/system.cxx
new file mode 100644
index 0000000..5436f88
--- /dev/null
+++ b/lib/event/system.cxx
@@ -0,0 +1,26 @@
+#include <event/system.hpp>
+#include <event/filter.hpp>
+#include <event/event.hpp>
+#include <stdexcept>
+#include <vector>
+
+using Event = sf::Event::EventType;
+
+namespace event {
+SfmlSystem::SfmlSystem(sf::Window &window) : window_(window) {
+}
+
+void SfmlSystem::add_filter(Filter &&f) {
+  filters_.push_back(f);
+}
+
+void SfmlSystem::enumerate(void) const {
+  /*for (auto const& filter : filters_) {
+    std::vector<Event> const empty_events;
+    bool const result = filter.send_events(empty_events);
+  }
+(*/
+  //throw std::runtime_error("Unimplemented");
+}
+
+}  // namespace event
diff --git a/lib/test_lib.cxx b/lib/test_lib.cxx
deleted file mode 100644
index e7487f4..0000000
--- a/lib/test_lib.cxx
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <test_include.hpp>
-#include <SFML/Graphics.hpp>
-#include <iostream>
-
-void test_fn(void) {
-  std::cout << "test_fn()" << std::endl;
-  sf::RenderWindow test(sf::VideoMode(800, 600), "TestProject");
-
-  sf::CircleShape shape(50);
-  shape.setFillColor(sf::Color(150, 100, 255));
-
-  while (test.isOpen()) {
-    sf::Event event;
-    while(test.pollEvent(event)) {
-      if (event.type == sf::Event::Closed) {
-        test.close();
-      }
-      test.draw(shape);
-      test.display();
-    }
-  }
-}
diff --git a/lib/tetrisplosion.cxx b/lib/tetrisplosion.cxx
index 5c47432..e672bdc 100644
--- a/lib/tetrisplosion.cxx
+++ b/lib/tetrisplosion.cxx
@@ -1,9 +1,33 @@
 #include <tetrisplosion.hpp>
+#include <window_config.hpp>
 
-namespace tet {
+using event::System;
 
+namespace tet {
 Tetrisplosion::Tetrisplosion(WindowConfig const& wc, MenuConfig const& mc)
-  : wc_(wc), mc_(mc) {
+  : mc_(mc), window_(sf::VideoMode(wc.width.get(), wc.height.get()), wc.title.get()),
+    event_system_(window_) {
+}
+
+int Tetrisplosion::run(void) {
+  sf::CircleShape shape(150);
+  shape.setFillColor(sf::Color(80, 80, 150));
+
+  while(window_.isOpen()) {
+    event_system_.enumerate();
+    window_.draw(shape);
+    window_.display();
+
+    /*sf::Event event;
+    while(window_.pollEvent(event)) {
+      if (event.type == sf::Event::Closed) {
+        window_.close();
+      }
+      window_.draw(shape);
+      window_.display();
+    }
+    */
+  }
 
 }
 
diff --git a/src/main.cxx b/src/main.cxx
index b7012fe..dacacc0 100644
--- a/src/main.cxx
+++ b/src/main.cxx
@@ -1,7 +1,6 @@
 #include <window_config.hpp>
 #include <menu_config.hpp>
 #include <tetrisplosion.hpp>
-#include <test_include.hpp>
 
 using tet::WindowConfig;
 using tet::WindowWidth;
@@ -18,7 +17,7 @@ int main(int argc, char *agv[])
   WindowConfig const window_config(width, height, title);
   MenuConfig const menu_config;
 
-  Tetrisplosion const tetrisplosion(window_config, menu_config);
-  test_fn();
+  Tetrisplosion tetrisplosion(window_config, menu_config);
+  tetrisplosion.run();
   return 0;
 }