ADD:: Test for ApplicationException.

src/Common/src/test/java/ApplicationExceptionTest.java

@@ -0,0 +1,22 @@
+import greenify.common.ApplicationException;
+import greenify.common.ErrorResponse;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class ApplicationExceptionTest {
+
+    @Test
+    public void setAndGetTest() {
+        ApplicationException ex = new ApplicationException("This is an exception");
+        assertEquals(ex.getMessage(), "This is an exception");
+    }
+
+    @Test
+    public void equalsTest() {
+        ApplicationException ex = new ApplicationException("This is an exception");
+        ApplicationException test = new ApplicationException("This is an exception");
+        assertEquals(ex.getMessage(), test.getMessage());
+    }
+
+}