diff --git a/Cargo.lock b/Cargo.lock
index 9746240..4a2e7ef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1718,6 +1718,7 @@ name = "youmubot-cf"
 version = "0.1.0"
 dependencies = [
  "Inflector 0.11.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "codeforces 0.1.0 (git+https://github.com/natsukagami/rust-codeforces-api)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1725,6 +1726,7 @@ dependencies = [
  "reqwest 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serenity 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "youmubot-db 0.1.0",
  "youmubot-prelude 0.1.0",
 ]
 
diff --git a/youmubot-cf/Cargo.toml b/youmubot-cf/Cargo.toml
index aafd64c..a2d0583 100644
--- a/youmubot-cf/Cargo.toml
+++ b/youmubot-cf/Cargo.toml
@@ -14,5 +14,7 @@ codeforces = { git = "https://github.com/natsukagami/rust-codeforces-api" }
 regex = "1"
 lazy_static = "1"
 rayon = "1"
+chrono = { version = "0.4", features = ["serde"] }
 
 youmubot-prelude = { path = "../youmubot-prelude" }
+youmubot-db = { path = "../youmubot-db" }
diff --git a/youmubot-cf/src/db.rs b/youmubot-cf/src/db.rs
new file mode 100644
index 0000000..62404f8
--- /dev/null
+++ b/youmubot-cf/src/db.rs
@@ -0,0 +1,26 @@
+use chrono::{DateTime, Utc};
+use serenity::model::id::UserId;
+use std::collections::HashMap;
+use youmubot_db::DB;
+use youmubot_prelude::*;
+
+/// A database map that stores an user with the respective handle.
+pub type CfSavedUsers = DB<HashMap<UserId, CfUser>>;
+
+/// A saved Codeforces user.
+#[derive(Debug, serde::Serialize, serde::Deserialize, Clone)]
+pub struct CfUser {
+    pub handle: String,
+    pub last_update: DateTime<Utc>,
+    pub rating: Option<i64>,
+}
+
+impl Default for CfUser {
+    fn default() -> Self {
+        Self {
+            handle: "".to_owned(),
+            last_update: Utc::now(),
+            rating: None,
+        }
+    }
+}
diff --git a/youmubot-cf/src/lib.rs b/youmubot-cf/src/lib.rs
index 53f9604..7271ea2 100644
--- a/youmubot-cf/src/lib.rs
+++ b/youmubot-cf/src/lib.rs
@@ -3,15 +3,26 @@ use serenity::{
         macros::{command, group},
         Args, CommandResult,
     },
-    model::{channel::Message, id::UserId},
+    model::channel::Message,
 };
 use youmubot_prelude::*;
 
+mod db;
 mod embed;
 mod hook;
 
+// /// Live-commentating a Codeforces round.
+// pub mod live;
+
+pub use db::CfSavedUsers;
 pub use hook::codeforces_info_hook;
 
+/// Sets up the CF databases.
+pub fn setup(path: &std::path::Path, data: &mut ShareMap) {
+    CfSavedUsers::insert_into(data, path.join("cf_saved_users.yaml"))
+        .expect("Must be able to set up DB")
+}
+
 #[group]
 #[prefix = "cf"]
 #[description = "Codeforces-related commands"]
diff --git a/youmubot/src/main.rs b/youmubot/src/main.rs
index 8f372bc..20a31ae 100644
--- a/youmubot/src/main.rs
+++ b/youmubot/src/main.rs
@@ -81,6 +81,9 @@ fn main() {
         // osu!
         #[cfg(feature = "osu")]
         youmubot_osu::discord::setup(&db_path, &client, &mut data).expect("osu! is initialized");
+        // codeforces
+        #[cfg(feature = "codeforces")]
+        youmubot_cf::setup(&db_path, &mut data);
     }
 
     #[cfg(feature = "core")]