[Java]: SbeTool should exit with a error code for unsupported input file type.

Author: mjpt777

main/java/uk/co/real_logic/sbe/SbeTool.java

@@ -98,8 +98,7 @@ public static void main(final String[] args) throws Exception
 
  for (final String fileName : args)
  {
- Ir ir = null;
-
+ final Ir ir;
  if (fileName.endsWith(".xml"))
  {
  ir = new IrGenerator().generate(parseSchema(fileName), System.getProperty(TARGET_NAMESPACE));
@@ -110,7 +109,9 @@ else if (fileName.endsWith(".sbeir"))
  }
  else
  {
- System.out.println("File format not supported.");
+ System.err.println("Input file format not supported: " + fileName);
+ System.exit(-1);
+ return;
  }
 
  if (Boolean.parseBoolean(System.getProperty(GENERATE_STUBS, "true")))