diff --git a/src/main/java/ic/doc/README.txt b/src/main/java/ic/doc/README.txt
deleted file mode 100644
index f2127d4..0000000
--- a/src/main/java/ic/doc/README.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-Put your implementation code in this directory. 
-Delete this file before submission.
diff --git a/src/main/java/ic/doc/ReversePolishStack.java b/src/main/java/ic/doc/ReversePolishStack.java
new file mode 100644
index 0000000..fc0d0a0
--- /dev/null
+++ b/src/main/java/ic/doc/ReversePolishStack.java
@@ -0,0 +1,7 @@
+package ic.doc;
+
+public class ReversePolishStack {
+  public int getSize() {
+    return 0;
+  }
+}
diff --git a/src/test/java/ic/doc/README.txt b/src/test/java/ic/doc/README.txt
deleted file mode 100644
index 6719ce3..0000000
--- a/src/test/java/ic/doc/README.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-Put your test code in this directory. 
-Delete this file before submission.
diff --git a/src/test/java/ic/doc/ReversePolishStackTest.java b/src/test/java/ic/doc/ReversePolishStackTest.java
new file mode 100644
index 0000000..5fff47e
--- /dev/null
+++ b/src/test/java/ic/doc/ReversePolishStackTest.java
@@ -0,0 +1,15 @@
+package ic.doc;
+
+import org.junit.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+public class ReversePolishStackTest {
+  final ReversePolishStack reversePolishStack = new ReversePolishStack();
+
+  @Test
+  public void reversePolishStackEmptyInitially() {
+    assertThat(reversePolishStack.getSize(), is(0));
+  }
+}