Implemented the Constants class

src/main/java/com/application/DB/Constants.java

+package com.application.DB;
+
+/**
+ * This class contains constants to be used related to database activities
+ */
+public final class Constants {
+
+    private Constants() {
+        // Empty constructor
+    }
+
+    public static final String PROJECT_ID = "sf-drying-optimization";
+
+}