diff --git a/examples/src/Entities/AuthCodeEntity.php b/examples/src/Entities/AuthCodeEntity.php
new file mode 100644
index 00000000..a54217ef
--- /dev/null
+++ b/examples/src/Entities/AuthCodeEntity.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace OAuth2ServerExamples\Entities;
+
+use League\OAuth2\Server\Entities\Interfaces\AuthCodeEntityInterface;
+use League\OAuth2\Server\Entities\Traits\AuthCodeTrait;
+use League\OAuth2\Server\Entities\Traits\EntityTrait;
+use League\OAuth2\Server\Entities\Traits\TokenEntityTrait;
+
+class AuthCodeEntity implements AuthCodeEntityInterface
+{
+    use EntityTrait, TokenEntityTrait, AuthCodeTrait;
+}
diff --git a/examples/src/Entities/RefreshTokenEntity.php b/examples/src/Entities/RefreshTokenEntity.php
new file mode 100644
index 00000000..13ea68eb
--- /dev/null
+++ b/examples/src/Entities/RefreshTokenEntity.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace OAuth2ServerExamples\Entities;
+
+use League\OAuth2\Server\Entities\Interfaces\RefreshTokenEntityInterface;
+use League\OAuth2\Server\Entities\Traits\EntityTrait;
+use League\OAuth2\Server\Entities\Traits\RefreshTokenTrait;
+
+class RefreshTokenEntity implements RefreshTokenEntityInterface
+{
+    use RefreshTokenTrait, EntityTrait;
+}
diff --git a/examples/src/Repositories/AuthCodeRepository.php b/examples/src/Repositories/AuthCodeRepository.php
index 0a670912..7145329f 100644
--- a/examples/src/Repositories/AuthCodeRepository.php
+++ b/examples/src/Repositories/AuthCodeRepository.php
@@ -4,38 +4,39 @@ namespace OAuth2ServerExamples\Repositories;
 
 use League\OAuth2\Server\Entities\Interfaces\AuthCodeEntityInterface;
 use League\OAuth2\Server\Repositories\AuthCodeRepositoryInterface;
+use OAuth2ServerExamples\Entities\AuthCodeEntity;
 
 class AuthCodeRepository implements AuthCodeRepositoryInterface
 {
     /**
-     * Persists a new auth code to permanent storage.
-     *
-     * @param \League\OAuth2\Server\Entities\Interfaces\AuthCodeEntityInterface $authCodeEntity
+     * @inheritdoc
      */
     public function persistNewAuthCode(AuthCodeEntityInterface $authCodeEntity)
     {
-        // TODO: Implement persistNewAuthCode() method.
+        // Some logic to persist the auth code to a database
     }
 
     /**
-     * Revoke an auth code.
-     *
-     * @param string $codeId
+     * @inheritdoc
      */
     public function revokeAuthCode($codeId)
     {
-        // TODO: Implement revokeAuthCode() method.
+        // Some logic to revoke the auth code in a database
     }
 
     /**
-     * Check if the auth code has been revoked.
-     *
-     * @param string $codeId
-     *
-     * @return bool Return true if this code has been revoked
+     * @inheritdoc
      */
     public function isAuthCodeRevoked($codeId)
     {
-        // TODO: Implement isAuthCodeRevoked() method.
+        return false; // The auth code has not been revoked
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getNewAuthCode()
+    {
+        return new AuthCodeEntity();
     }
 }
diff --git a/examples/src/Repositories/RefreshTokenRepository.php b/examples/src/Repositories/RefreshTokenRepository.php
index 15f19ddf..e481dfcc 100644
--- a/examples/src/Repositories/RefreshTokenRepository.php
+++ b/examples/src/Repositories/RefreshTokenRepository.php
@@ -4,38 +4,39 @@ namespace OAuth2ServerExamples\Repositories;
 
 use League\OAuth2\Server\Entities\Interfaces\RefreshTokenEntityInterface;
 use League\OAuth2\Server\Repositories\RefreshTokenRepositoryInterface;
+use OAuth2ServerExamples\Entities\RefreshTokenEntity;
 
 class RefreshTokenRepository implements RefreshTokenRepositoryInterface
 {
     /**
-     * Create a new refresh token_name.
-     *
-     * @param \League\OAuth2\Server\Entities\Interfaces\RefreshTokenEntityInterface $refreshTokenEntityInterface
+     * @inheritdoc
      */
     public function persistNewRefreshToken(RefreshTokenEntityInterface $refreshTokenEntityInterface)
     {
-        // TODO: Implement persistNewRefreshToken() method.
+        // Some logic to persist the refresh token in a database
     }
 
     /**
-     * Revoke the refresh token.
-     *
-     * @param string $tokenId
+     * @inheritdoc
      */
     public function revokeRefreshToken($tokenId)
     {
-        // TODO: Implement revokeRefreshToken() method.
+        // Some logic to revoke the refresh token in a database
     }
 
     /**
-     * Check if the refresh token has been revoked.
-     *
-     * @param string $tokenId
-     *
-     * @return bool Return true if this token has been revoked
+     * @inheritdoc
      */
     public function isRefreshTokenRevoked($tokenId)
     {
-        // TODO: Implement isRefreshTokenRevoked() method.
+        return false; // The refresh token has not been revoked
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getNewRefreshToken()
+    {
+        return new RefreshTokenEntity();
     }
 }
diff --git a/src/Entities/Traits/AuthCodeTrait.php b/src/Entities/Traits/AuthCodeTrait.php
new file mode 100644
index 00000000..61a1e65c
--- /dev/null
+++ b/src/Entities/Traits/AuthCodeTrait.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace League\OAuth2\Server\Entities\Traits;
+
+trait AuthCodeTrait
+{
+    /**
+     * @var null|string
+     */
+    protected $redirectUri;
+
+    /**
+     * @return string
+     */
+    public function getRedirectUri()
+    {
+        return $this->redirectUri;
+    }
+
+    /**
+     * @param string $uri
+     */
+    public function setRedirectUri($uri)
+    {
+        $this->redirectUri = $uri;
+    }
+}