diff --git a/platform/lang-impl/src/com/intellij/refactoring/rename/naming/AutomaticRenamerFactory.java b/platform/lang-impl/src/com/intellij/refactoring/rename/naming/AutomaticRenamerFactory.java
index dc747b921247..9500a8896b13 100644
--- a/platform/lang-impl/src/com/intellij/refactoring/rename/naming/AutomaticRenamerFactory.java
+++ b/platform/lang-impl/src/com/intellij/refactoring/rename/naming/AutomaticRenamerFactory.java
@@ -19,24 +19,62 @@ package com.intellij.refactoring.rename.naming;
 import com.intellij.openapi.extensions.ExtensionPointName;
 import com.intellij.psi.PsiElement;
 import com.intellij.usageView.UsageInfo;
+import org.jetbrains.annotations.Nls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.Collection;
 
 /**
+ * When an element is renamed, allows to prompt the user to rename other elements with names derived from the name of the
+ * element being renamed (for example, when a class is renamed, allows to prompt the user to rename variables of this class
+ * that have names similar to the name of the class).
+ *
  * @author yole
  */
 public interface AutomaticRenamerFactory {
   ExtensionPointName<AutomaticRenamerFactory> EP_NAME = ExtensionPointName.create("com.intellij.automaticRenamerFactory");
 
+  /**
+   * Checks if this factory can provide additional elements to be renamed for the given element being renamed.
+   *
+   * @param element the element being renamed.
+   * @return
+   */
   boolean isApplicable(@NotNull PsiElement element);
 
+  /**
+   * Returns the title of the checkbox shown in the rename dialog which enables or disables this renamer factory,
+   * or null if the renamer factory does not require showing a checkbox in the rename dialog.
+   *
+   * @return the checkbox title.
+   */
   @Nullable
+  @Nls
   String getOptionName();
 
+  /**
+   * Returns true if this renamer factory is enabled (and the checkbox representing its state should be checked.)
+   * Normally, the implementation of this method needs to load the persisted state of the checkbox.
+   * @return
+   */
   boolean isEnabled();
+
+  /**
+   * Persists the state of the checkbox which enables or disables the renamer factory.
+   *
+   * @param enabled true if the checkbox is checked, false otherwise.
+   */
   void setEnabled(boolean enabled);
 
+  /**
+   * Creates an automatic renamer for the given rename operation.
+   *
+   * @param element the primary element being renamed.
+   * @param newName the new name of the element
+   * @param usages  the list of usages of the primary element.
+   * @return the renamer instance.
+   */
+  @NotNull
   AutomaticRenamer createRenamer(final PsiElement element, final String newName, final Collection<UsageInfo> usages);
 }