diff --git a/src/lib.rs b/src/lib.rs
index b93cf3f..1543da2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,14 +1,2 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}
+pub mod session;
+pub mod server;
diff --git a/src/server.rs b/src/server.rs
new file mode 100644
index 0000000..7754b94
--- /dev/null
+++ b/src/server.rs
@@ -0,0 +1 @@
+pub struct SessionServer();
diff --git a/src/session.rs b/src/session.rs
new file mode 100644
index 0000000..704d549
--- /dev/null
+++ b/src/session.rs
@@ -0,0 +1 @@
+pub struct Session();