refactor: add private constructor to fix PMD UseUtilityClass smell

Signed-off-by: AleGTorres <[email protected]>

Author: AleGTorres

src/main/java/org/springframework/samples/petclinic/PetClinicApplication.java

@@ -29,8 +29,12 @@
 @ImportRuntimeHints(PetClinicRuntimeHints.class)
 public class PetClinicApplication {
 
-	public static void main(String[] args) {
-		SpringApplication.run(PetClinicApplication.class, args);
+    private PetClinicApplication() {
+		// prevent instantiation
 	}
 
+    public static void main(String[] args) {
+        SpringApplication.run(PetClinicApplication.class, args);
+    }
+
 }

src/test/java/org/springframework/samples/petclinic/MysqlTestApplication.java

@@ -32,16 +32,20 @@
 @Configuration
 public class MysqlTestApplication {
 
-	@ServiceConnection
-	@Profile("mysql")
-	@Bean
-	static MySQLContainer<?> container() {
-		return new MySQLContainer<>(DockerImageName.parse("mysql:9.2"));
-	}
+    private MysqlTestApplication() {
+        // prevent instantiation
+    }
 
-	public static void main(String[] args) {
-		SpringApplication.run(PetClinicApplication.class, "--spring.profiles.active=mysql",
-				"--spring.docker.compose.enabled=false");
-	}
+    @ServiceConnection
+    @Profile("mysql")
+    @Bean
+    static MySQLContainer<?> container() {
+        return new MySQLContainer<>(DockerImageName.parse("mysql:9.2"));
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(PetClinicApplication.class, "--spring.profiles.active=mysql",
+                "--spring.docker.compose.enabled=false");
+    }
 
 }