Let ScriptModules flush their output after their done

This is required to make sure that the errors that were printed to
the provided error writer (e.g. in the error panel of the script
editor) are actually shown.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

src/main/java/org/scijava/script/ScriptModule.java

@@ -32,6 +32,7 @@
 package org.scijava.script;
 
 import java.io.FileReader;
+import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.Reader;
 import java.io.Writer;
@@ -191,6 +192,20 @@ public void run() {
 			final Object typed = ConversionUtils.convert(decoded, item.getType());
 			setOutput(name, typed);
 		}
+
+		if (output != null) try {
+			output.flush();
+		} catch (IOException e) {
+			if (error == null) {
+				log.error(e);
+			} else {
+				e.printStackTrace(errorPrinter);
+			}
+		}
+
+		if (errorPrinter != null) {
+			errorPrinter.flush();
+		}
 	}
 
 	// -- Contextual methods --