fix annotation, add @Contract

java/java-psi-api/src/com/intellij/psi/util/PropertyUtil.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@ import com.intellij.psi.codeStyle.VariableKind;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.IncorrectOperationException;
 import com.intellij.util.containers.ContainerUtil;
+import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -44,7 +45,8 @@ public class PropertyUtil {
   private PropertyUtil() {
   }
 
-  public static boolean isSimplePropertyGetter(@NotNull PsiMethod method) {
+  @Contract("null -> false")
+  public static boolean isSimplePropertyGetter(@Nullable PsiMethod method) {
     return hasGetterName(method) && method.getParameterList().getParametersCount() == 0;
   }