diff --git a/src/domain/rolle.rs b/src/domain/rolle.rs
index e8cc49b..3adb766 100644
--- a/src/domain/rolle.rs
+++ b/src/domain/rolle.rs
@@ -1,5 +1,5 @@
 pub mod entity;
 pub mod model;
+pub mod mutation;
 pub mod repository;
 pub mod service;
-
diff --git a/src/domain/rolle/model.rs b/src/domain/rolle/model.rs
index e9e6de2..0080c30 100644
--- a/src/domain/rolle/model.rs
+++ b/src/domain/rolle/model.rs
@@ -1,5 +1,6 @@
-mod create_rolle_input;
 mod rolle;
-mod update_rolle_input;
+mod rolle_create_input;
+mod rolle_update_input;
 
-pub use create_rolle_input::CreateRolleInput;
+pub use rolle::Rolle;
+pub use rolle_create_input::RolleCreateInput;
diff --git a/src/domain/rolle/model/rolle.rs b/src/domain/rolle/model/rolle.rs
index c954d57..8407cd5 100644
--- a/src/domain/rolle/model/rolle.rs
+++ b/src/domain/rolle/model/rolle.rs
@@ -10,6 +10,9 @@ pub struct Rolle {
     /// Wann die Rolle erstellt wurde
     pub created_at: Time,
 
+    /// Wann die Rolle geändert wurde
+    pub updated_at: Time,
+
     /// Der Name einer Rolle
     pub name: String,
 }
diff --git a/src/domain/rolle/model/create_rolle_input.rs b/src/domain/rolle/model/rolle_create_input.rs
similarity index 78%
rename from src/domain/rolle/model/create_rolle_input.rs
rename to src/domain/rolle/model/rolle_create_input.rs
index 6b7eeb9..544cee9 100644
--- a/src/domain/rolle/model/create_rolle_input.rs
+++ b/src/domain/rolle/model/rolle_create_input.rs
@@ -1,7 +1,7 @@
 use async_graphql::InputObject;
 
 #[derive(InputObject)]
-pub struct CreateRolleInput {
+pub struct RolleCreateInput {
     /// Der Name einer Rolle
     pub name: String,
 }
diff --git a/src/domain/rolle/model/update_rolle_input.rs b/src/domain/rolle/model/rolle_update_input.rs
similarity index 85%
rename from src/domain/rolle/model/update_rolle_input.rs
rename to src/domain/rolle/model/rolle_update_input.rs
index 8dbc231..180d973 100644
--- a/src/domain/rolle/model/update_rolle_input.rs
+++ b/src/domain/rolle/model/rolle_update_input.rs
@@ -3,7 +3,7 @@ use async_graphql::InputObject;
 use crate::scalar::Id;
 
 #[derive(InputObject)]
-pub struct UpdateRolleInput {
+pub struct RolleUpdateInput {
     /// Die ID einer Rolle
     pub id: Id,
 
diff --git a/src/domain/rolle/mutation.rs b/src/domain/rolle/mutation.rs
new file mode 100644
index 0000000..b497a47
--- /dev/null
+++ b/src/domain/rolle/mutation.rs
@@ -0,0 +1,35 @@
+use super::model::*;
+use async_graphql::{Context, FieldResult};
+use sqlx::postgres::PgPool;
+
+#[derive(Default)]
+pub struct RolleMutation;
+
+#[async_graphql::Object]
+impl RolleMutation {
+    async fn create_rollen(
+        &self,
+        ctx: &Context<'_>,
+        input: RolleCreateInput,
+    ) -> FieldResult<Rolle> {
+        let pool = ctx.data::<PgPool>()?;
+        todo!();
+        // let row = Rolle::create(pool, &input).await?;
+        // Ok(row)
+    }
+
+    // async fn update_rollen(
+    //     &self,
+    //     ctx: &Context<'_>,
+    //     input: RolleUpdateInput,
+    // ) -> FieldResult<Rolle> {
+    //     let pool = ctx.data::<PgPool>()?;
+    //     let row = Rolle::update(pool, &input).await?;
+    //     Ok(row)
+    // }
+    //
+    // async fn delete_rollen(&self, ctx: &Context<'_>, id: i32) -> FieldResult<bool> {
+    //     let pool = ctx.data::<PgPool>()?;
+    //     Ok(Rolle::delete(pool, &id).await?)
+    // }
+}
diff --git a/src/domain/rolle/repository.rs b/src/domain/rolle/repository.rs
index 846849e..e03bb34 100644
--- a/src/domain/rolle/repository.rs
+++ b/src/domain/rolle/repository.rs
@@ -1,7 +1,7 @@
 mod create_rolle;
 mod delete_rolle;
 mod find_all_rolle;
-mod find_rolle;
+mod find_rolle_by_id;
 mod update_rolle;
 
 #[derive(Debug, Clone)]
diff --git a/src/domain/rolle/repository/create_rolle.rs b/src/domain/rolle/repository/create_rolle.rs
index 1e90476..472d935 100644
--- a/src/domain/rolle/repository/create_rolle.rs
+++ b/src/domain/rolle/repository/create_rolle.rs
@@ -1,6 +1,7 @@
 use anyhow::Error;
 
 use super::Repository;
+// use crate::domain::rolle::model;
 use crate::{database::Queryer, domain::rolle::entity};
 
 impl Repository {
diff --git a/src/domain/rolle/repository/find_rolle.rs b/src/domain/rolle/repository/find_rolle_by_id.rs
similarity index 100%
rename from src/domain/rolle/repository/find_rolle.rs
rename to src/domain/rolle/repository/find_rolle_by_id.rs
diff --git a/src/domain/rolle/service/create_user.rs b/src/domain/rolle/service/create_user.rs
index 7f17cad..0bf8586 100644
--- a/src/domain/rolle/service/create_user.rs
+++ b/src/domain/rolle/service/create_user.rs
@@ -4,10 +4,10 @@ use ulid::Ulid;
 
 use super::Service;
 use crate::domain::rolle::entity;
-use crate::domain::rolle::model::CreateRolleInput;
+use crate::domain::rolle::model::RolleCreateInput;
 
 impl Service {
-    pub async fn create_rolle(&self, input: CreateRolleInput) -> Result<entity::Rolle, Error> {
+    pub async fn create_rolle(&self, input: RolleCreateInput) -> Result<entity::Rolle, Error> {
         // let username_exists = self.check_username_exists(&self.db, &input.name).await?;
         // if username_exists {
         //     return Err(Error::UsernameAlreadyExists.into());
diff --git a/src/models/hersteller.rs b/src/models/hersteller.rs
index a3d3254..b23ae69 100644
--- a/src/models/hersteller.rs
+++ b/src/models/hersteller.rs
@@ -14,12 +14,16 @@ pub struct Hersteller {
 
 #[derive(InputObject, Debug)]
 pub struct HerstellerCreateInput {
+    /// Der Name eines Herstellers
     pub name: String,
 }
 
 #[derive(InputObject, Debug)]
 pub struct HerstellerUpdateInput {
+    /// Die Datenbank-ID
     pub id: i32,
+
+    /// Der Name eines Herstellers
     pub name: Option<String>,
 }