1 files changed, 8 insertions, 0 deletions
diff --git a/platform/testFramework/src/com/intellij/util/io/TestFileSystemBuilder.java b/platform/testFramework/src/com/intellij/util/io/TestFileSystemBuilder.java
index da7dc5cfa162..9ee314d52b8d 100644
--- a/platform/testFramework/src/com/intellij/util/io/TestFileSystemBuilder.java
+++ b/platform/testFramework/src/com/intellij/util/io/TestFileSystemBuilder.java
@@ -1,5 +1,7 @@
 package com.intellij.util.io;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * @author nik
  */
@@ -12,6 +14,7 @@ public class TestFileSystemBuilder {
     myParent = parent;
   }
 
+  @NotNull
   public TestFileSystemItem build() {
     TestFileSystemBuilder builder = this;
     while (builder.myParent != null) {
@@ -20,23 +23,27 @@ public class TestFileSystemBuilder {
     return builder.myItem;
   }
 
+  @NotNull
   public TestFileSystemBuilder dir(String name) {
     final TestFileSystemItem item = new TestFileSystemItem(name, false, true);
     myItem.addChild(item);
     return new TestFileSystemBuilder(item, this);
   }
 
+  @NotNull
   public TestFileSystemBuilder archive(String name) {
     final TestFileSystemItem item = new TestFileSystemItem(name, true, false);
     myItem.addChild(item);
     return new TestFileSystemBuilder(item, this);
   }
 
+  @NotNull
   public TestFileSystemBuilder file(String name) {
     myItem.addChild(new TestFileSystemItem(name, false, false));
     return this;
   }
 
+  @NotNull
   public TestFileSystemBuilder file(String name, String content) {
     myItem.addChild(new TestFileSystemItem(name, false, false, content));
     return this;
@@ -46,6 +53,7 @@ public class TestFileSystemBuilder {
     return myParent;
   }
 
+  @NotNull
   public static TestFileSystemBuilder fs() {
     return new TestFileSystemBuilder(new TestFileSystemItem("root", false, true), null);
   }