diff --git a/src/event.cpp b/src/event.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/src/event.h b/src/event.h
new file mode 100644
index 0000000..b18d13f
--- /dev/null
+++ b/src/event.h
@@ -0,0 +1,13 @@
+#ifndef EVENT
+#define EVENT
+
+class event {
+	/* TODO:
+	 * event number
+	 * value
+	 * time
+	 * wire number
+	 */
+};
+
+#endif // !EVENT
diff --git a/src/gate.cpp b/src/gate.cpp
index e69de29..8b13789 100644
--- a/src/gate.cpp
+++ b/src/gate.cpp
@@ -0,0 +1 @@
+
diff --git a/src/gate.h b/src/gate.h
index cab58a6..aa293e2 100644
--- a/src/gate.h
+++ b/src/gate.h
@@ -2,7 +2,15 @@
 #define GATE
 
 class gate {
-
+	public:
+		gate(wire* wire1 = nullptr, wire* wire2 = nullptr, wire* wire3 = nullptr);
+		virtual int getOutput() = 0;
+	protected:
+		wire* in1, in2, out;
+	/* TODO
+	 * delay
+	 * type
+	 */
 };
 
-#endif // !GATE
\ No newline at end of file
+#endif // !GATE
diff --git a/src/wire.h b/src/wire.h
index d23a6cb..cd4c638 100644
--- a/src/wire.h
+++ b/src/wire.h
@@ -2,7 +2,14 @@
 #define WIRE
 
 class wire {
-
+	/* TODO:
+	 * data members:
+	 * state
+	 * gate connections
+	 * wire number
+	 * name
+	 * is input/output
+	 */
 };
 
-#endif // !WIRE
\ No newline at end of file
+#endif // !WIRE