diff --git a/opentracing-impl-java8/src/main/java/io/opentracing/AbstractSpan.java b/opentracing-impl-java8/src/main/java/io/opentracing/AbstractSpan.java
index 1c6fac45..2262d6fd 100644
--- a/opentracing-impl-java8/src/main/java/io/opentracing/AbstractSpan.java
+++ b/opentracing-impl-java8/src/main/java/io/opentracing/AbstractSpan.java
@@ -16,6 +16,7 @@
 import java.time.Duration;
 import java.time.Instant;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -23,9 +24,9 @@
 
 abstract class AbstractSpan implements Span, SpanContext {
 
-    String operationName;
+    private String operationName;
 
-    protected final Map<String,String> baggage = new HashMap<>();
+    private final Map<String,String> baggage = new HashMap<>();
 
     private final Instant start;
     private Duration duration;
@@ -51,6 +52,7 @@ public void finish() {
         assert null == duration;
         duration = Duration.between(start, Instant.now());
     }
+
     @Override
     public void finish(long finishMicros) {
         long finishEpochSeconds = TimeUnit.MICROSECONDS.toSeconds(finishMicros);
@@ -59,6 +61,24 @@ public void finish(long finishMicros) {
         duration = Duration.between(start, Instant.ofEpochSecond(finishEpochSeconds, nanos));
     }
 
+    public final String getOperationName() {
+    	return operationName;
+    }
+
+    @Override
+    public Span setOperationName(String operationName) {
+        this.operationName = operationName;
+        return this;
+    }
+
+    public final Instant getStart() {
+    	return start;
+    }
+
+    public final Duration getDuration() {
+    	return duration;
+    }
+
     @Override
     public final void close() {
         finish();
@@ -82,6 +102,10 @@ public final Span setTag(String key, Number value) {
         return this;
     }
 
+    public final Map<String,Object> getTags() {
+        return Collections.unmodifiableMap(tags);
+    }
+
     @Override
     public AbstractSpan setBaggageItem(String key, String value) {
         baggage.put(key, value);
@@ -98,6 +122,10 @@ public final Iterable<Map.Entry<String,String>> baggageItems() {
         return baggage.entrySet();
     }
 
+    public final Map<String,String> getBaggage() {
+    	return Collections.unmodifiableMap(baggage);
+    }
+
     @Override
     public final Span log(String message, /* @Nullable */ Object payload) {
         Instant now = Instant.now();
@@ -114,10 +142,8 @@ public final Span log(long instantMicroseconds, String message, /* @Nullable */
         return this;
     }
 
-    @Override
-    public Span setOperationName(String operationName) {
-        this.operationName = operationName;
-        return this;
+    public final List<LogData> getLogs() {
+        return Collections.unmodifiableList(logs);
     }
 
     final class LogData {
diff --git a/opentracing-impl-java8/src/test/java/io/opentracing/AbstractTracerTest.java b/opentracing-impl-java8/src/test/java/io/opentracing/AbstractTracerTest.java
index 0d4ad212..a5c7b186 100644
--- a/opentracing-impl-java8/src/test/java/io/opentracing/AbstractTracerTest.java
+++ b/opentracing-impl-java8/src/test/java/io/opentracing/AbstractTracerTest.java
@@ -37,7 +37,7 @@ public void testBuildSpan() {
         Tracer.SpanBuilder result = instance.buildSpan(operationName);
         AbstractSpan span = (AbstractSpan) result.start();
         assertNotNull("Expected to create a valid Span", span);
-        assertEquals("Expected to create a Span with operationName", operationName, span.operationName);
+        assertEquals("Expected to create a Span with operationName", operationName, span.getOperationName());
     }
 
     /**
@@ -114,7 +114,7 @@ AbstractSpanBuilder withStateItem(String key, Object value) {
 
         @Override
         Map<String, Object> getTraceState(SpanContext spanContext) {
-            return new HashMap<>(((AbstractSpan)spanContext).baggage);
+            return new HashMap<>(((AbstractSpan)spanContext).getBaggage());
         }
     }
 
diff --git a/opentracing-impl-java8/src/test/java/io/opentracing/TestTextMapInjectorImpl.java b/opentracing-impl-java8/src/test/java/io/opentracing/TestTextMapInjectorImpl.java
index f738c8d3..4a2f09bc 100644
--- a/opentracing-impl-java8/src/test/java/io/opentracing/TestTextMapInjectorImpl.java
+++ b/opentracing-impl-java8/src/test/java/io/opentracing/TestTextMapInjectorImpl.java
@@ -19,6 +19,6 @@
 final class TestTextMapInjectorImpl implements Injector<TextMap> {
     @Override
     public void inject(SpanContext spanContext, TextMap carrier) {
-        carrier.put("test-marker", ((AbstractSpan)spanContext).operationName);
+        carrier.put("test-marker", ((AbstractSpan)spanContext).getOperationName());
     }
 }