FIX:: checkstyle fixes

src/Common/src/main/java/greenify/common/ApplicationException.java

@@ -2,7 +2,7 @@ package greenify.common;
 
 public class ApplicationException extends RuntimeException {
     /**
-     * This method returns an application exception message.
+     * This method sends an application exception message.
      * @param message the exception message
      */
     public ApplicationException(String message) {

src/Common/src/main/java/greenify/common/ErrorResponse.java

@@ -17,7 +17,7 @@ public class ErrorResponse {
     public ErrorResponse() { }
 
     /**
-     * This method returns the message.
+     * This method gets the message.
      * @return the message
      */
     public String getMessage() {

src/Common/src/main/java/greenify/common/UserDto.java

@@ -6,6 +6,7 @@
   resorting to remote interfaces (e.g., web services),
   where each call is an expensive operation.
  */
+
 package greenify.common;
 
 public class UserDto {

src/Common/src/test/java/ErrorResponseTest.java

@@ -1,4 +1,5 @@
 import static org.junit.Assert.assertEquals;
+
 import greenify.common.ErrorResponse;
 import org.junit.Test;
 

src/Common/src/test/java/UserDtoTest.java

@@ -1,4 +1,5 @@
 import static org.junit.Assert.assertEquals;
+
 import greenify.common.UserDto;
 import org.junit.Test;