Fixed most reported issues by SonarCloud.

saga/pom.xml

@@ -40,6 +40,11 @@
             <artifactId>junit</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
     <build>
         <plugins>

saga/src/test/java/com/iluwatar/saga/choreography/SagaApplicationTest.java

@@ -25,13 +25,15 @@ package com.iluwatar.saga.choreography;
 import com.iluwatar.saga.orchestration.SagaApplication;
 import org.junit.Test;
 
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
 
 /***
  * empty test
  */
 public class SagaApplicationTest {
   @Test
-  public void mainTest() {
-    SagaApplication.main(new String[]{});
+  public void shouldExecuteWithoutException() {
+    assertDoesNotThrow(() -> SagaApplication.main(new String[]{}));
   }
 }