added basic services

src/constants/ConstFormatters.java

@@ -0,0 +1,7 @@
+package constants;
+
+import java.text.SimpleDateFormat;
+
+public class ConstFormatters{
+    final public static SimpleDateFormat APPLICATION_DATE_FORMATTER = new SimpleDateFormat("dd-MM-yyyy");
+}

src/constants/ConstValues.java

@@ -0,0 +1,7 @@
+package constants;
+
+public class ConstValues {
+    //I
+    final public static String inputCountryName = "Enter country: ";
+    final public static String inputDate = "Enter date: ";
+}

src/services/AppConfigService.java

@@ -12,8 +12,8 @@ import java.util.Scanner;
  * Prompts and stores the configuration that the app needs to be run with.
  */
 public class AppConfigService {
-    public String countryName;
-    public Date date;
+    String countryName;
+    Date date;
 
     /**
      * Prompts the user to input the country name and date, and stores the input.