applied final changes to the project

src/main/Evaluator.java

@@ -13,6 +13,9 @@ public class Evaluator implements Visitor<Double> {
 
     private double value;
 
+    /**
+     * @see #visit(Parser.Expression, int)
+     */
     @Override
     public Double visit(final Parser.BinaryOperation expression) {
         double result = expression.leftExpression.accept(this);
@@ -48,17 +51,25 @@ public class Evaluator implements Visitor<Double> {
         return result;
     }
 
+    /**
+     * @see #visit(Parser.Expression, int)
+     */
     @Override
     public Double visit(final Parser.Variable variable) {
         return value;
     }
 
-
+    /**
+     * @see #visit(Parser.Expression, int)
+     */
     @Override
     public Double visit(final Parser.Decimal decimal) {
         return Double.parseDouble(decimal.beforeDot.digits + "." + decimal.afterDot.digits);
     }
 
+    /**
+     * @see #visit(Parser.Expression, int)
+     */
     @Override
     public Double visit(final Parser.Number number) {
         return Double.parseDouble(number.digits);