diff --git a/jps/jps-builders/src/org/jetbrains/jps/incremental/BuilderService.java b/jps/jps-builders/src/org/jetbrains/jps/incremental/BuilderService.java
index 090507e5105b..1036eb3c8278 100644
--- a/jps/jps-builders/src/org/jetbrains/jps/incremental/BuilderService.java
+++ b/jps/jps-builders/src/org/jetbrains/jps/incremental/BuilderService.java
@@ -22,6 +22,10 @@ import java.util.Collections;
 import java.util.List;
 
 /**
+ * The main entry point for the external build system plugins. Implementations of this class are registered as Java services, by
+ * creating a file META-INF/services/org.jetbrains.jps.incremental.BuilderService containing the qualified name of your implementation
+ * class.
+ *
  * @author nik
  */
 public abstract class BuilderService {