diff --git a/concept.events.ts b/concept.events.ts
index 1094691..dd1f7d8 100644
--- a/concept.events.ts
+++ b/concept.events.ts
@@ -1,30 +1,30 @@
-import { ConceptResponseDTO } from './dto/conceptresponse.dto';
-
-export class ConceptCreateEvent {
-  type = 'create';
+import { ConceptResponseDTO } from "./dto/conceptresponse.dto";
+import type { ConceptEvent } from "./events";
+export class ConceptCreateEvent implements ConceptEvent {
+  type = "create";
   constructor(public concept: ConceptResponseDTO) {
     this.concept = new ConceptResponseDTO(concept);
   }
 }
 
-export class ConceptEditEvent {
-  type = 'edit';
+export class ConceptEditEvent implements ConceptEvent {
+  type = "edit";
   constructor(public concept: ConceptResponseDTO) {
     this.concept = new ConceptResponseDTO(concept);
   }
 }
 
-export class ConceptDeleteEvent {
-  type = 'delete';
+export class ConceptDeleteEvent implements ConceptEvent {
+  type = "delete";
   constructor(public id: number) {}
 }
 
-export class ConceptEnableEvent {
-  type = 'enable';
+export class ConceptEnableEvent implements ConceptEvent {
+  type = "enable";
   constructor(public id: number) {}
 }
 
-export class ConceptDisableEvent {
-  type = 'disable';
+export class ConceptDisableEvent implements ConceptEvent {
+  type = "disable";
   constructor(public id: number) {}
 }
diff --git a/events.ts b/events.ts
new file mode 100644
index 0000000..b160e66
--- /dev/null
+++ b/events.ts
@@ -0,0 +1,3 @@
+export interface ConceptEvent {
+  type: string;
+}
diff --git a/game.events.ts b/game.events.ts
index 53a2bd4..ad298f9 100644
--- a/game.events.ts
+++ b/game.events.ts
@@ -1,45 +1,46 @@
-import { MessageResponseDTO } from './dto/messageresponse.dto';
-import { PlayerResponseDTO } from './dto/playerresponse.dto';
+import { MessageResponseDTO } from "./dto/messageresponse.dto";
+import { PlayerResponseDTO } from "./dto/playerresponse.dto";
+import type { ConceptEvent } from "./events";
 
-export class GameStartEvent {
-  type = 'start';
+export class GameStartEvent implements ConceptEvent {
+  type = "start";
   constructor(public currentPlayer: PlayerResponseDTO) {
     this.currentPlayer = new PlayerResponseDTO(currentPlayer);
   }
 }
 
-export class GameDeleteEvent {
-  type = 'delete';
+export class GameDeleteEvent implements ConceptEvent {
+  type = "delete";
 }
 
-export class GameJoinEvent {
-  type = 'joingame';
+export class GameJoinEvent implements ConceptEvent {
+  type = "joingame";
   constructor(public player: PlayerResponseDTO) {
     this.player = new PlayerResponseDTO(player);
   }
 }
 
-export class GameLeaveEvent {
-  type = 'leavegame';
+export class GameLeaveEvent implements ConceptEvent {
+  type = "leavegame";
   constructor(public player: PlayerResponseDTO) {
     this.player = new PlayerResponseDTO(player);
   }
 }
 
-export class GameMessageEvent {
-  type = 'message';
+export class GameMessageEvent implements ConceptEvent {
+  type = "message";
   constructor(public message: MessageResponseDTO) {
     this.message = new MessageResponseDTO(message);
   }
 }
 
-export class GameMessageDeleteEvent {
-  type = 'deleteMessage';
+export class GameMessageDeleteEvent implements ConceptEvent {
+  type = "deleteMessage";
   constructor(public messageId: number) {}
 }
 
-export class GameEndTurnEvent {
-  type = 'endTurn';
+export class GameEndTurnEvent implements ConceptEvent {
+  type = "endTurn";
   constructor(public currentPlayer: PlayerResponseDTO) {
     this.currentPlayer = new PlayerResponseDTO(currentPlayer);
   }
diff --git a/lobby.events.ts b/lobby.events.ts
index ee81cea..0c8ddce 100644
--- a/lobby.events.ts
+++ b/lobby.events.ts
@@ -1,28 +1,29 @@
-import { GameResponseDTO } from './dto/gameresponse.dto';
-import { PlayerResponseDTO } from './dto/playerresponse.dto';
+import { GameResponseDTO } from "./dto/gameresponse.dto";
+import { PlayerResponseDTO } from "./dto/playerresponse.dto";
+import type { ConceptEvent } from "./events";
 
-export class LobbyCreateEvent {
-  type = 'create';
+export class LobbyCreateEvent implements ConceptEvent {
+  type = "create";
   game: GameResponseDTO;
   constructor(game: GameResponseDTO) {
     this.game = new GameResponseDTO(game);
   }
 }
 
-export class LobbyStartEvent {
-  type = 'start';
+export class LobbyStartEvent implements ConceptEvent {
+  type = "start";
   constructor(public game: GameResponseDTO) {
     this.game = new GameResponseDTO(game);
   }
 }
 
-export class LobbyDeleteEvent {
-  type = 'delete';
+export class LobbyDeleteEvent implements ConceptEvent {
+  type = "delete";
   constructor(public id: number) {}
 }
 
-export class LobbyJoinEvent {
-  type = 'joingame';
+export class LobbyJoinEvent implements ConceptEvent {
+  type = "joingame";
   constructor(
     public player: PlayerResponseDTO,
     public game: GameResponseDTO,
@@ -32,8 +33,8 @@ export class LobbyJoinEvent {
   }
 }
 
-export class LobbyLeaveEvent {
-  type = 'leavegame';
+export class LobbyLeaveEvent implements ConceptEvent {
+  type = "leavegame";
   gameId?: number;
   constructor(
     public player: PlayerResponseDTO,
diff --git a/word.events.ts b/word.events.ts
index fb9a588..a567f4a 100644
--- a/word.events.ts
+++ b/word.events.ts
@@ -1,30 +1,31 @@
-import { WordResponseDTO } from './dto/wordresponse.dto';
+import { WordResponseDTO } from "./dto/wordresponse.dto";
+import type { ConceptEvent } from "./events";
 
-export class WordCreateEvent {
-  type = 'create';
+export class WordCreateEvent implements ConceptEvent {
+  type = "create";
   constructor(public word: WordResponseDTO) {
     this.word = new WordResponseDTO(word);
   }
 }
 
-export class WordEditEvent {
-  type = 'edit';
+export class WordEditEvent implements ConceptEvent {
+  type = "edit";
   constructor(public word: WordResponseDTO) {
     this.word = new WordResponseDTO(word);
   }
 }
 
-export class WordDeleteEvent {
-  type = 'delete';
+export class WordDeleteEvent implements ConceptEvent {
+  type = "delete";
   constructor(public id: number) {}
 }
 
-export class WordEnableEvent {
-  type = 'enable';
+export class WordEnableEvent implements ConceptEvent {
+  type = "enable";
   constructor(public id: number) {}
 }
 
-export class WordDisableEvent {
-  type = 'disable';
+export class WordDisableEvent implements ConceptEvent {
+  type = "disable";
   constructor(public id: number) {}
 }