Clean up base package

src/main/java/org/asamk/signal/output/JsonWriterImpl.java

@@ -0,0 +1,35 @@
+package org.asamk.signal.output;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.asamk.signal.util.Util;
+
+import java.io.IOException;
+import java.io.Writer;
+
+public class JsonWriterImpl implements JsonWriter {
+
+    private final Writer writer;
+    private final ObjectMapper objectMapper;
+
+    public JsonWriterImpl(final Writer writer) {
+        this.writer = writer;
+        this.objectMapper = Util.createJsonObjectMapper();
+    }
+
+    public synchronized void write(final Object object) {
+        try {
+            try {
+                objectMapper.writeValue(writer, object);
+            } catch (JsonProcessingException e) {
+                // Some issue with json serialization, probably caused by a bug
+                throw new AssertionError(e);
+            }
+            writer.write(System.lineSeparator());
+            writer.flush();
+        } catch (IOException e) {
+            throw new AssertionError(e);
+        }
+    }
+}