diff --git a/estruct.h b/estruct.h
index 63e9f2b..9b514f9 100644
--- a/estruct.h
+++ b/estruct.h
@@ -7,6 +7,6 @@
 #define LICENSE "BSD-3-Clause" /* Default SPDX-License-Identifier */
 
 #define QAUTHOR 0 /* Force use the default author option */
-#define AUTHOR "fSD" /* Default author*/
+#define AUTHOR "fSD" /* Default author */
 
 #endif  /* ESTRUCT_H_ */
diff --git a/proj.c b/proj.c
index 35db282..c3732f9 100644
--- a/proj.c
+++ b/proj.c
@@ -52,6 +52,7 @@ int makeproj(char *src) {
 #include <string.h>\n\
 \n\
 #include \"version.h\"\n\
+#include \"estruct.h\"\n\
 \n\
 void usage(int status)\n\
 {\n\
@@ -77,7 +78,7 @@ int main(int argc, char **argv)\n\
     }\n\
   }\n\
 \n\
-  puts(\"Hello, World!\");\n\
+  puts(MESSAGE);\n\
 \n\
   return 0;\n\
 }", src, author, src, src);
@@ -218,5 +219,46 @@ release: $(PROGRAM)\n\
 	$(E) \"  CC      \" $@\n\
 	$(Q) $(CC) $(CFLAGS) $(DEFINES) -c $< -o $@", src, src);
 
+  ffwrite("usage.h", "\
+#ifndef USAGE_H_\n\
+#define USAGE_H_\n\
+\n\
+void die(const char* err, ...);\n\
+\n\
+#endif  /* USAGE_H_ */");
+  ffwrite("usage.c", "\
+#include \"usage.h\"\n\
+\n\
+#include <stdarg.h>\n\
+#include <stdio.h>\n\
+#include <stdlib.h>\n\
+\n\
+static void report(const char* prefix, const char *err, va_list params)\n\
+{\n\
+  char msg[4096];\n\
+  vsnprintf(msg, sizeof(msg), err, params);\n\
+  fprintf(stderr, \"%%s%%s\\n\", prefix, msg);\n\
+}\n\
+\n\
+void die(const char* err, ...)\n\
+{\n\
+  va_list params;\n\
+\n\
+  va_start(params, err);\n\
+  report(\"fatal: \", err, params);\n\
+  va_end(params);\n\
+  exit(128);\n\
+}");
+
+  ffwrite("estruct.h", "\
+#ifndef ESTRUCT_H_\n\
+#define ESTRUCT_H_\n\
+\n\
+/* Configuration options */\n\
+\n\
+#define MESSAGE \"Hello, World!\" /* Default greeting */\n\
+\n\
+#endif  /* ESTRUCT_H_ */");
+
   return 0;
 }