add tests

exporters/logging-otlp/src/test/java/io/opentelemetry/exporter/logging/otlp/internal/writer/StreamJsonWriterTest.java

@@ -55,7 +55,7 @@ void errorWriting() throws IOException {
   }
 
   @Test
-  void errorFlushing() throws IOException {
+  void errorFlushing() {
     OutputStream outputStream =
         new FilterOutputStream(System.out) {
           @Override