diff --git a/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/AbstractPrintElementGenerator.java b/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/AbstractPrintElementGenerator.java
index 1a48f05100f5..71df4dc77589 100644
--- a/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/AbstractPrintElementGenerator.java
+++ b/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/AbstractPrintElementGenerator.java
@@ -93,14 +93,16 @@ public abstract class AbstractPrintElementGenerator implements PrintElementGener
     return result;
   }
 
-  private SimplePrintElementImpl createSimplePrintElement(int rowIndex, SimpleRowElement rowElement) {
+  @NotNull
+  private SimplePrintElementImpl createSimplePrintElement(int rowIndex, @NotNull SimpleRowElement rowElement) {
     return new SimplePrintElementImpl(rowIndex, rowElement.myPosition, rowElement.myElement, myPrintElementManager);
   }
 
+  @NotNull
   private EdgePrintElementImpl createEdgePrintElement(int rowIndex,
                                                       @NotNull ShortEdge shortEdge,
                                                       @NotNull EdgePrintElement.Type type,
-                                                      @NotNull boolean hasArrow) {
+                                                      boolean hasArrow) {
     int positionInCurrentRow, positionInOtherRow;
     if (type == EdgePrintElement.Type.DOWN) {
       positionInCurrentRow = shortEdge.myUpPosition;
diff --git a/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/elements/PrintElementWithGraphElement.java b/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/elements/PrintElementWithGraphElement.java
index b1f93f358360..510137a86386 100644
--- a/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/elements/PrintElementWithGraphElement.java
+++ b/platform/vcs-log/graph/src/com/intellij/vcs/log/graph/impl/print/elements/PrintElementWithGraphElement.java
@@ -64,6 +64,7 @@ public abstract class PrintElementWithGraphElement implements PrintElement {
     return myPrintElementManager.isSelected(this);
   }
 
+  @NotNull
   public static PrintElementWithGraphElement converted(@NotNull PrintElementWithGraphElement element,
                                                        @NotNull GraphElement convertedGraphElement) {
     return new PrintElementWithGraphElement(element.getRowIndex(), element.getPositionInCurrentRow(), convertedGraphElement,