Add main entry point (#3233)

spring-security-acl/pom.xml

@@ -3,7 +3,6 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>com.baeldung</groupId>
     <artifactId>spring-security-acl</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <packaging>war</packaging>

spring-security-acl/src/main/java/org/baeldung/acl/Application.java

@@ -0,0 +1,11 @@
+package org.baeldung.acl;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}