added CountCSVWriterStage

src/main/java/kiekpad/analysis/util/CountCSVWriterStage.java

+package kiekpad.analysis.util;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
+import java.time.Duration;
+import java.time.Instant;
+
+import teetime.framework.AbstractConsumerStage;
+
+public class CountCSVWriterStage extends AbstractConsumerStage<Object> {
+
+	private final PrintWriter printWriter;
+	private int counter = 0;
+	private final Instant start;
+
+	public CountCSVWriterStage(final File file) {
+		try {
+			this.printWriter = new PrintWriter(file);
+		} catch (FileNotFoundException e) {
+			throw new IllegalStateException(e);
+		}
+		this.start = Instant.now();
+		writeRow();
+	}
+
+	@Override
+	protected void execute(final Object object) {
+		this.counter++;
+		writeRow();
+	}
+
+	@Override
+	public void onTerminating() {
+		this.printWriter.close();
+	}
+
+	private void writeRow() {
+		final long time = Duration.between(this.start, Instant.now()).toNanos();
+		this.printWriter.write(time + "," + this.counter);
+	}
+
+}