diff --git a/java/jsinterop/generator/writer/CodeWriter.java b/java/jsinterop/generator/writer/CodeWriter.java
index d4edadf..d5c8c58 100644
--- a/java/jsinterop/generator/writer/CodeWriter.java
+++ b/java/jsinterop/generator/writer/CodeWriter.java
@@ -23,6 +23,7 @@
 import static jsinterop.generator.model.PredefinedTypes.OBJECT;
 
 import com.google.common.base.Splitter;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -73,6 +74,7 @@ public CodeWriter emit(String s) {
     return this;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitNewLine() {
     emit("\n");
     return this;
@@ -106,19 +108,23 @@ private String getImportedTypeName(TypeReference typeReference) {
     return typeReferenceImport.substring(index + 1);
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitAnnotations(List<Annotation> annotations) {
     annotations.forEach(a -> AnnotationWriter.emit(a, this));
     return this;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitGenerics(Collection<TypeReference> typeGenerics, boolean emitConstraint) {
     return emitTypeReferences(typeGenerics.iterator(), "<", ">", emitConstraint);
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitTypeReferences(Collection<TypeReference> typeReferences) {
     return emitTypeReferences(typeReferences.iterator(), "", "", false);
   }
 
+  @CanIgnoreReturnValue
   private CodeWriter emitTypeReferences(
       Iterator<TypeReference> typeReferences, String start, String end, boolean emitConstraint) {
 
@@ -144,6 +150,7 @@ public void setPackage(String aPackageName) {
     packageName = aPackageName;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitJavadoc(String javadoc) {
     if (isNullOrEmpty(javadoc)) {
       return this;
@@ -177,6 +184,7 @@ public CodeWriter emitJavadoc(String javadoc) {
     return this;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitSingleLineComment(String comment) {
     if (isNullOrEmpty(comment)) {
       return this;
@@ -189,14 +197,17 @@ public CodeWriter emitSingleLineComment(String comment) {
     return this;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitTypeReference(TypeReference type) {
     return emitTypeReference(type, false, true);
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitTypeReference(TypeReference typeReference, boolean emitConstraint) {
     return emitTypeReference(typeReference, emitConstraint, true);
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitTypeReference(
       TypeReference typeReference, boolean emitConstraint, boolean emitNullable) {
     emitSingleLineComment(typeReference.getComment());
@@ -252,6 +263,7 @@ public CodeWriter emitTypeReference(
     return this;
   }
 
+  @CanIgnoreReturnValue
   private CodeWriter emitNullableAnnotation(TypeReference typeReference, boolean emitNullable) {
     if (emitNullable && typeReference.isNullable()) {
       emit("@").emitTypeReference(NULLABLE.getType()).emit(" ");
@@ -295,11 +307,13 @@ private void writeImports(StringBuilder content) {
         .forEach(content::append);
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emit(AccessModifier accessModifier) {
     emit(accessModifier.getLitteral());
     return this;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitStatement(Statement statement) {
     if (statement.getLeadingComment() != null) {
       emit("// ").emit(statement.getLeadingComment()).emitNewLine();
@@ -318,6 +332,7 @@ public CodeWriter emitStatement(Statement statement) {
     return this;
   }
 
+  @CanIgnoreReturnValue
   public CodeWriter emitExpression(Expression expression) {
     if (expression instanceof MethodInvocation) {
       return emitMethodInvocation(((MethodInvocation) expression));
@@ -349,10 +364,12 @@ public CodeWriter emitExpression(Expression expression) {
     throw new RuntimeException("Unknown Expression");
   }
 
+  @CanIgnoreReturnValue
   private CodeWriter emitTypeQualifier(TypeQualifier typeQualifier) {
     return emitTypeReference(typeQualifier.getType());
   }
 
+  @CanIgnoreReturnValue
   private CodeWriter emitMethodInvocation(MethodInvocation methodInvocation) {
     if (methodInvocation.getInvocationTarget() != null) {
       emitExpression(methodInvocation.getInvocationTarget()).emit(".");