style: fix missing newlines at end of files

backend/src/main/java/de/szut/casino/exceptionHandling/exceptions/OAuth2AuthenticationProcessingException.java

@@ -6,4 +6,4 @@ public class OAuth2AuthenticationProcessingException extends AuthenticationExcep
     public OAuth2AuthenticationProcessingException(String msg) {
         super(msg);
     }
-}
+}

backend/src/main/java/de/szut/casino/security/GitHubController.java

@@ -46,4 +46,4 @@ public class GitHubController {
         AuthResponseDto response = githubService.processGithubCode(code);
         return ResponseEntity.ok(response);
     }
-}
+}

backend/src/main/java/de/szut/casino/security/GitHubService.java

@@ -162,4 +162,4 @@ public class GitHubService {
             throw new RuntimeException("Failed to process GitHub authentication", e);
         }
     }
-}
+}

backend/src/main/java/de/szut/casino/security/dto/GithubCallbackDto.java

@@ -5,4 +5,4 @@ import lombok.Data;
 @Data
 public class GithubCallbackDto {
     private String code;
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/CustomOAuth2UserService.java

@@ -102,4 +102,4 @@ public class CustomOAuth2UserService extends DefaultOAuth2UserService {
         }
         return userRepository.save(existingUser);
     }
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/GitHubOAuth2UserInfo.java

@@ -22,4 +22,4 @@ public class GitHubOAuth2UserInfo extends OAuth2UserInfo {
     public String getEmail() {
         return (String) attributes.get("email");
     }
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/OAuth2AuthenticationSuccessHandler.java

@@ -52,4 +52,4 @@ public class OAuth2AuthenticationSuccessHandler extends SimpleUrlAuthenticationS
                 .queryParam("token", token)
                 .build().toUriString();
     }
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/OAuth2Config.java

@@ -12,4 +12,4 @@ public class OAuth2Config {
     public PasswordEncoder oauth2PasswordEncoder() {
         return new BCryptPasswordEncoder();
     }
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/OAuth2UserInfo.java

@@ -17,4 +17,4 @@ public abstract class OAuth2UserInfo {
     public abstract String getName();
 
     public abstract String getEmail();
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/OAuth2UserInfoFactory.java

@@ -14,4 +14,4 @@ public class OAuth2UserInfoFactory {
             throw new OAuth2AuthenticationProcessingException("Sorry! Login with " + registrationId + " is not supported yet.");
         }
     }
-}
+}

backend/src/main/java/de/szut/casino/security/oauth2/UserPrincipal.java

@@ -99,4 +99,4 @@ public class UserPrincipal implements OAuth2User, UserDetails {
     public String getName() {
         return String.valueOf(id);
     }
-}
+}

backend/src/main/java/de/szut/casino/user/AuthProvider.java

@@ -3,4 +3,4 @@ package de.szut.casino.user;
 public enum AuthProvider {
     LOCAL,
     GITHUB
-}
+}