diff --git a/api/src/main/java/org/jboss/forge/parser/java/JavaSource.java b/api/src/main/java/org/jboss/forge/parser/java/JavaSource.java
index 43fdd1e3..40c75278 100644
--- a/api/src/main/java/org/jboss/forge/parser/java/JavaSource.java
+++ b/api/src/main/java/org/jboss/forge/parser/java/JavaSource.java
@@ -88,4 +88,9 @@ public interface JavaSource<T extends JavaSource<T>> extends
     * Return the {@link SourceType} of this {@link JavaSource} instance.
     */
    public SourceType getSourceType();
+
+   /**
+    * Return true if this {@link JavaSource} can be edited.
+    */
+   public boolean isEditable();
 }
\ No newline at end of file
diff --git a/impl/src/main/java/org/jboss/forge/parser/java/impl/AbstractJavaSource.java b/impl/src/main/java/org/jboss/forge/parser/java/impl/AbstractJavaSource.java
index 8942be0c..aa953d1d 100644
--- a/impl/src/main/java/org/jboss/forge/parser/java/impl/AbstractJavaSource.java
+++ b/impl/src/main/java/org/jboss/forge/parser/java/impl/AbstractJavaSource.java
@@ -878,6 +878,12 @@ public List<JavaSource<?>> getNestedClasses()
       return result;
    }
 
+   @Override
+   public boolean isEditable()
+   {
+      return true;
+   }
+
    private List<AbstractTypeDeclaration> getNestedDeclarations(BodyDeclaration body)
    {
 
diff --git a/impl/src/main/java/org/jboss/forge/parser/java/impl/JavaPackageInfoImpl.java b/impl/src/main/java/org/jboss/forge/parser/java/impl/JavaPackageInfoImpl.java
index 448ad58f..85471d90 100644
--- a/impl/src/main/java/org/jboss/forge/parser/java/impl/JavaPackageInfoImpl.java
+++ b/impl/src/main/java/org/jboss/forge/parser/java/impl/JavaPackageInfoImpl.java
@@ -739,6 +739,12 @@ public List<JavaSource<?>> getNestedClasses()
       return result;
    }
 
+   @Override
+   public boolean isEditable()
+   {
+      return true;
+   }
+
    private List<AbstractTypeDeclaration> getNestedDeclarations(ASTNode body)
    {
 
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/FieldTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/FieldTest.java
index cc9823fe..78d9fc80 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/FieldTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/FieldTest.java
@@ -34,6 +34,7 @@ public void reset()
       stream = FieldTest.class.getResourceAsStream("/org/jboss/forge/grammar/java/MockAnnotatedField.java");
       javaClass = JavaParser.parse(JavaClass.class, stream);
       field = javaClass.getFields().get(javaClass.getFields().size() - 1);
+      assertTrue(field.getOrigin().isEditable());
    }
 
    @Test
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaAnnotationTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaAnnotationTest.java
index 821ba0e9..4522c163 100755
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaAnnotationTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaAnnotationTest.java
@@ -41,6 +41,7 @@ public void setup()
                JavaAnnotationTest.class
                         .getResourceAsStream("/org/jboss/forge/grammar/java/MockJavaAnnotationType.java");
       javaAnnotation = JavaParser.parse(JavaAnnotation.class, stream);
+      assertTrue(javaAnnotation.isEditable());
    }
 
    @Test
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassCreationTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassCreationTest.java
index 6f68b8b7..63ccdd5c 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassCreationTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassCreationTest.java
@@ -32,6 +32,7 @@ public void testClassCreatesStub() throws Exception
    {
       assertEquals("JavaClass", jc.getName());
       assertTrue(jc.isPublic());
+      assertTrue(jc.isEditable());
    }
 
 }
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassMethodTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassMethodTest.java
index 7c00c39f..fd5b8ba9 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassMethodTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaClassMethodTest.java
@@ -37,6 +37,7 @@ public void reset()
       javaClass = JavaParser.parse(JavaClass.class, stream);
       javaClass.addMethod("public URL rewriteURL(String pattern, String replacement) { return null; }");
       method = javaClass.getMethods().get(javaClass.getMethods().size() - 1);
+      assertTrue(method.getOrigin().isEditable());
    }
 
    @Test
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumFieldTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumFieldTest.java
index d1877727..a516183a 100755
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumFieldTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumFieldTest.java
@@ -34,6 +34,7 @@ public void reset()
       stream = JavaEnumFieldTest.class.getResourceAsStream("/org/jboss/forge/grammar/java/MockEnum.java");
       javaEnum = JavaParser.parse(JavaEnum.class, stream);
       field = javaEnum.getFields().get(javaEnum.getFields().size() - 1);
+      assertTrue(field.getOrigin().isEditable());
    }
 
    @Test
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumMethodTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumMethodTest.java
index 6f9cb885..024de351 100755
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumMethodTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaEnumMethodTest.java
@@ -38,6 +38,7 @@ public void reset()
       javaEnum = JavaParser.parse(JavaEnum.class, stream);
       javaEnum.addMethod("public URL rewriteURL(String pattern, String replacement) { return null; }");
       method = javaEnum.getMethods().get(javaEnum.getMethods().size() - 1);
+      assertTrue(method.getOrigin().isEditable());
    }
 
    @Test
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaInterfaceTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaInterfaceTest.java
index d90ee0eb..6c43dd30 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/JavaInterfaceTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/JavaInterfaceTest.java
@@ -58,6 +58,7 @@ public void testImportJavaSource() throws Exception
       assertFalse(foo.hasImport(bar));
       assertFalse(bar.hasImport(foo));
 
+      assertTrue(foo.isEditable());
       Import importBar = foo.addImport(bar);
       assertTrue(foo.hasImport(bar));
       assertFalse(bar.hasImport(foo));
@@ -74,6 +75,7 @@ public void testImportJavaSource() throws Exception
    public void testImportImport() throws Exception
    {
       JavaInterface foo = JavaParser.parse(JavaInterface.class, "public interface Foo{}");
+      assertTrue(foo.isEditable());
       Import i = foo.addImport(getClass());
 
       foo.removeImport(getClass());
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/NestedClassTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/NestedClassTest.java
index 8235bc4a..ade32770 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/NestedClassTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/NestedClassTest.java
@@ -64,6 +64,7 @@ public void testModifyNestedClassModifiesParentSource()
 
       List<JavaSource<?>> nestedClasses = javaClass.getNestedClasses();
       JavaSource<?> inner1 = nestedClasses.get(0);
+      Assert.assertTrue(inner1.isEditable());
       inner1.addAnnotation(Deprecated.class);
 
       Assert.assertTrue(javaClass.toString().contains("@Deprecated"));
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/common/AnnotationTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/common/AnnotationTest.java
index b9995b6a..9770c37c 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/common/AnnotationTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/common/AnnotationTest.java
@@ -44,6 +44,7 @@ protected void setTarget(final AnnotationTarget<O, T> target)
    public void reset()
    {
       resetTests();
+      assertTrue(target.getOrigin().isEditable());
    }
 
    public abstract void resetTests();
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/common/InterfacedTestBase.java b/impl/src/test/java/org/jboss/forge/test/parser/java/common/InterfacedTestBase.java
index 776c3d41..e4ed751f 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/common/InterfacedTestBase.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/common/InterfacedTestBase.java
@@ -33,6 +33,7 @@ public abstract class InterfacedTestBase<T extends JavaSource<T> & InterfaceCapa
    public void reset()
    {
       this.source = getSource();
+      assertTrue(this.source.isEditable());
    }
 
    protected abstract T getSource();
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/common/JavaClassTestBase.java b/impl/src/test/java/org/jboss/forge/test/parser/java/common/JavaClassTestBase.java
index b1044b27..8009a539 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/common/JavaClassTestBase.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/common/JavaClassTestBase.java
@@ -34,6 +34,7 @@ public abstract class JavaClassTestBase
    public void reset()
    {
       this.source = getSource();
+      assertTrue(this.source.isEditable());
    }
 
    protected abstract JavaClass getSource();
@@ -283,7 +284,7 @@ public void testAddConstructor() throws Exception
    }
 
    @Test
-   public void testAddConstructorIngoresReturnTypeAndName() throws Exception
+   public void testAddConstructorIgnoresReturnTypeAndName() throws Exception
    {
       int size = source.getMethods().size();
       Method<JavaClass> method = source.addMethod().setName("testMethod").setConstructor(true).setPrivate()
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/common/VisibilityTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/common/VisibilityTest.java
index d567d368..d2c213d4 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/common/VisibilityTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/common/VisibilityTest.java
@@ -9,6 +9,7 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import org.jboss.forge.parser.java.JavaSource;
 import org.jboss.forge.parser.java.VisibilityScoped;
 import org.junit.Before;
 import org.junit.Test;
@@ -29,6 +30,9 @@ public void setTarget(VisibilityScoped<?> target)
    public void reset() throws Exception
    {
       resetTests();
+      if (this.target instanceof JavaSource<?>) {
+         assertTrue(((JavaSource<?>) this.target).isEditable());
+      }
    }
 
    public abstract void resetTests() throws Exception;
diff --git a/impl/src/test/java/org/jboss/forge/test/parser/java/util/RefactoryTest.java b/impl/src/test/java/org/jboss/forge/test/parser/java/util/RefactoryTest.java
index 5083bbba..6ad784f6 100644
--- a/impl/src/test/java/org/jboss/forge/test/parser/java/util/RefactoryTest.java
+++ b/impl/src/test/java/org/jboss/forge/test/parser/java/util/RefactoryTest.java
@@ -37,6 +37,7 @@ public void before()
       javaClass = JavaParser
                .parse(JavaClass.class,
                         "import java.util.Set; public class Foo { private int foo; private String firstName; private Set<String> names; private final int bar; }");
+      assertTrue(javaClass.isEditable());
    }
 
    @Test