Proposed fix for issue #61

src/main/java/com/helger/jcodemodel/fmt/JSerializedObject.java

@@ -84,6 +84,7 @@ public void close ()
     })
     {
       oos.writeObject (m_aObj);
+      oos.flush();
     }
   }
 }

src/main/java/com/helger/jcodemodel/fmt/JTextFile.java

@@ -98,6 +98,7 @@ public void close ()
       })
       {
         w.write (m_sContents);
+        w.flush();
       }
   }
 }

src/test/java/com/helger/jcodemodel/supplementary/issues/Issue61FuncTest.java

@@ -0,0 +1,71 @@
+/**
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
+ * Portions Copyright 2013-2018 Philip Helger + contributors
+ *
+ * The contents of this file are subject to the terms of either the GNU
+ * General Public License Version 2 only ("GPL") or the Common Development
+ * and Distribution License("CDDL") (collectively, the "License").  You
+ * may not use this file except in compliance with the License.  You can
+ * obtain a copy of the License at
+ * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
+ * or packager/legal/LICENSE.txt.  See the License for the specific
+ * language governing permissions and limitations under the License.
+ *
+ * When distributing the software, include this License Header Notice in each
+ * file and include the License file at packager/legal/LICENSE.txt.
+ *
+ * GPL Classpath Exception:
+ * Oracle designates this particular file as subject to the "Classpath"
+ * exception as provided by Oracle in the GPL Version 2 section of the License
+ * file that accompanied this code.
+ *
+ * Modifications:
+ * If applicable, add the following below the License Header, with the fields
+ * enclosed by brackets [] replaced by your own identifying information:
+ * "Portions Copyright [year] [name of copyright owner]"
+ *
+ * Contributor(s):
+ * If you wish your version of this file to be governed by only the CDDL or
+ * only the GPL Version 2, indicate your decision by adding "[Contributor]
+ * elects to include this software in this distribution under the [CDDL or GPL
+ * Version 2] license."  If you don't indicate a single choice of license, a
+ * recipient has the option to distribute your version of this file under
+ * either the CDDL, the GPL Version 2 or to extend the choice of license to
+ * its licensees as provided above.  However, if you add GPL Version 2 code
+ * and therefore, elected the GPL Version 2 license, then the option applies
+ * only if the new code is made subject to such option by the copyright
+ * holder.
+ */
+package com.helger.jcodemodel.supplementary.issues;
+
+import com.helger.jcodemodel.JCodeModel;
+import com.helger.jcodemodel.fmt.JTextFile;
+import com.helger.jcodemodel.writer.SingleStreamCodeWriter;
+import java.io.ByteArrayOutputStream;
+import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+
+/**
+ * Test for https://github.com/phax/jcodemodel/issues/61
+ *
+ * @author Flavio Baronti
+ */
+public class Issue61FuncTest {
+  @Test
+  public void testIssue () throws Exception
+  {
+    final JCodeModel generator = new JCodeModel ();
+    final Charset ascii = Charset.forName("US-ASCII");
+    final ByteArrayOutputStream resOut = new ByteArrayOutputStream();
+    final JTextFile res = (JTextFile) generator.rootPackage().addResourceFile(new JTextFile("example.txt", ascii));
+
+    res.setContents("Testing");
+    generator.build(new SingleStreamCodeWriter(new ByteArrayOutputStream()), new SingleStreamCodeWriter(resOut));
+    String txtRes = ascii.decode(ByteBuffer.wrap(resOut.toByteArray())).toString();
+    assertTrue(txtRes.contains("Testing"));
+  }
+}