#107 Interpreter example JavaDoc

interpreter/src/main/java/com/iluwatar/interpreter/App.java

@@ -4,7 +4,7 @@ import java.util.Stack;
 
 /**
  * 
- * Interpreter pattern breaks sentences into expressions (Expression) that can
+ * Interpreter pattern breaks sentences into expressions ({@link Expression}) that can
  * be evaluated and as a whole form the result.
  * 
  */
@@ -12,9 +12,13 @@ public class App {
 
 	/**
 	 * 
+	 * Program entry point.
+	 * <p>
 	 * Expressions can be evaluated using prefix, infix or postfix notations
 	 * This sample uses postfix, where operator comes after the operands
 	 * 
+	 * @param args command line args
+	 * 
 	 */
 	public static void main(String[] args) {
 		String tokenString = "4 3 2 - 1 + *";

interpreter/src/main/java/com/iluwatar/interpreter/Expression.java

@@ -1,5 +1,10 @@
 package com.iluwatar.interpreter;
 
+/**
+ * 
+ * Expression
+ *
+ */
 public abstract class Expression {
 
 	public abstract int interpret();

interpreter/src/main/java/com/iluwatar/interpreter/MinusExpression.java

@@ -1,5 +1,10 @@
 package com.iluwatar.interpreter;
 
+/**
+ * 
+ * MinusExpression
+ *
+ */
 public class MinusExpression extends Expression {
 
 	private Expression leftExpression;

interpreter/src/main/java/com/iluwatar/interpreter/MultiplyExpression.java

@@ -1,5 +1,10 @@
 package com.iluwatar.interpreter;
 
+/**
+ * 
+ * MultiplyExpression
+ *
+ */
 public class MultiplyExpression extends Expression {
 
 	private Expression leftExpression;

interpreter/src/main/java/com/iluwatar/interpreter/NumberExpression.java

@@ -1,5 +1,10 @@
 package com.iluwatar.interpreter;
 
+/**
+ * 
+ * NumberExpression
+ *
+ */
 public class NumberExpression extends Expression {
 
 	private int number;

interpreter/src/main/java/com/iluwatar/interpreter/PlusExpression.java

@@ -1,5 +1,10 @@
 package com.iluwatar.interpreter;
 
+/**
+ * 
+ * PlusExpression
+ *
+ */
 public class PlusExpression extends Expression {
 
 	private Expression leftExpression;

interpreter/src/test/java/com/iluwatar/interpreter/AppTest.java

@@ -4,6 +4,11 @@ import org.junit.Test;
 
 import com.iluwatar.interpreter.App;
 
+/**
+ * 
+ * Application test
+ *
+ */
 public class AppTest {
 
 	@Test