diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/ClassDataIndexer.java b/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/ClassDataIndexer.java
index f06ad3fa8987..d4f52370a929 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/ClassDataIndexer.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/ClassDataIndexer.java
@@ -336,6 +336,7 @@ public class ClassDataIndexer implements DataIndexer<Bytes, HEquations, FileCont
         return result;
       }
 
+      @NotNull
       private LeakingParameters leakingParametersAndFrames(Method method, MethodNode methodNode, Type[] argumentTypes, boolean jsr)
         throws AnalyzerException {
         return argumentTypes.length < 32 ?
diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/LeakingParameters.java b/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/LeakingParameters.java
index 97b129b9c774..42ee796d4bcf 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/LeakingParameters.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/LeakingParameters.java
@@ -39,6 +39,7 @@ public class LeakingParameters {
     this.nullableParameters = nullableParameters;
   }
 
+  @NotNull
   public static LeakingParameters build(String className, MethodNode methodNode, boolean jsr) throws AnalyzerException {
     Frame<ParamsValue>[] frames = jsr ?
                                   new Analyzer<ParamsValue>(new ParametersUsage(methodNode)).analyze(className, methodNode) :
@@ -67,6 +68,7 @@ public class LeakingParameters {
     return new LeakingParameters((Frame<Value>[])(Frame<?>[])frames, notNullParameters, nullableParameters);
   }
 
+  @NotNull
   public static LeakingParameters buildFast(String className, MethodNode methodNode, boolean jsr) throws AnalyzerException {
     IParametersUsage parametersUsage = new IParametersUsage(methodNode);
     Frame<?>[] frames = jsr ?
diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/OriginsAnalysis.java b/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/OriginsAnalysis.java
index e154bf847730..1ae134d47dc2 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/OriginsAnalysis.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/OriginsAnalysis.java
@@ -16,6 +16,7 @@
 package com.intellij.codeInspection.bytecodeAnalysis.asm;
 
 import gnu.trove.TIntArrayList;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.org.objectweb.asm.Opcodes;
 import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode;
@@ -93,6 +94,7 @@ public class OriginsAnalysis {
    * @return array, array[i] == true means that the result of a method execution may originate at an i-th instruction
    * @throws AnalyzerException
    */
+  @NotNull
   public static boolean[] resultOrigins(Frame<Value>[] frames, InsnList instructions, ControlFlowGraph graph) throws AnalyzerException {
 
     TIntArrayList[] backTransitions = new TIntArrayList[instructions.size()];
@@ -178,7 +180,8 @@ public class OriginsAnalysis {
     return null;
   }
 
-  private static Frame<SourceValue> makePreFrame(Frame<Value> frame) {
+  @NotNull
+  private static Frame<SourceValue> makePreFrame(@NotNull Frame<Value> frame) {
     Frame<SourceValue> preFrame = new Frame<SourceValue>(frame.getLocals(), frame.getMaxStackSize());
     for (int i = 0; i < frame.getLocals(); i++) {
       preFrame.setLocal(i, new PreValue(true, i, frame.getLocal(i).getSize()));