diff --git a/src/enginuity/ramtune/test/command/generator/AbstractCommandGenerator.java b/src/enginuity/ramtune/test/command/generator/AbstractCommandGenerator.java
new file mode 100644
index 00000000..2c2ca3ca
--- /dev/null
+++ b/src/enginuity/ramtune/test/command/generator/AbstractCommandGenerator.java
@@ -0,0 +1,15 @@
+package enginuity.ramtune.test.command.generator;
+
+import enginuity.io.protocol.Protocol;
+import static enginuity.util.ParamChecker.checkNotNull;
+
+public abstract class AbstractCommandGenerator implements CommandGenerator {
+    protected final Protocol protocol;
+
+    public AbstractCommandGenerator(Protocol protocol) {
+        checkNotNull(protocol, "protocol");
+        this.protocol = protocol;
+    }
+
+    public abstract String toString();
+}
diff --git a/src/enginuity/ramtune/test/command/generator/EcuInitCommandGenerator.java b/src/enginuity/ramtune/test/command/generator/EcuInitCommandGenerator.java
index 09bba144..a15aaec2 100644
--- a/src/enginuity/ramtune/test/command/generator/EcuInitCommandGenerator.java
+++ b/src/enginuity/ramtune/test/command/generator/EcuInitCommandGenerator.java
@@ -3,14 +3,11 @@ package enginuity.ramtune.test.command.generator;
 import enginuity.io.protocol.Protocol;
 import enginuity.ramtune.test.command.Command;
 import enginuity.ramtune.test.command.CommandImpl;
-import static enginuity.util.ParamChecker.checkNotNull;
-
-public final class EcuInitCommandGenerator implements CommandGenerator {
-    private final Protocol protocol;
 
+public final class EcuInitCommandGenerator extends AbstractCommandGenerator {
+    
     public EcuInitCommandGenerator(Protocol protocol) {
-        checkNotNull(protocol, "protocol");
-        this.protocol = protocol;
+        super(protocol);
     }
 
     public Command createCommand(byte[] address, byte[] data) {
diff --git a/src/enginuity/ramtune/test/command/generator/ReadCommandGenerator.java b/src/enginuity/ramtune/test/command/generator/ReadCommandGenerator.java
index 3d97d70a..cf4058ad 100644
--- a/src/enginuity/ramtune/test/command/generator/ReadCommandGenerator.java
+++ b/src/enginuity/ramtune/test/command/generator/ReadCommandGenerator.java
@@ -3,15 +3,12 @@ package enginuity.ramtune.test.command.generator;
 import enginuity.io.protocol.Protocol;
 import enginuity.ramtune.test.command.Command;
 import enginuity.ramtune.test.command.CommandImpl;
-import static enginuity.util.ParamChecker.checkNotNull;
 import static enginuity.util.ParamChecker.checkNotNullOrEmpty;
 
-public final class ReadCommandGenerator implements CommandGenerator {
-    private final Protocol protocol;
+public final class ReadCommandGenerator extends AbstractCommandGenerator {
 
     public ReadCommandGenerator(Protocol protocol) {
-        checkNotNull(protocol, "protocol");
-        this.protocol = protocol;
+        super(protocol);
     }
 
     public Command createCommand(byte[] address, byte[] data) {
diff --git a/src/enginuity/ramtune/test/command/generator/WriteCommandGenerator.java b/src/enginuity/ramtune/test/command/generator/WriteCommandGenerator.java
index b987acb2..5b9a9566 100644
--- a/src/enginuity/ramtune/test/command/generator/WriteCommandGenerator.java
+++ b/src/enginuity/ramtune/test/command/generator/WriteCommandGenerator.java
@@ -3,15 +3,12 @@ package enginuity.ramtune.test.command.generator;
 import enginuity.io.protocol.Protocol;
 import enginuity.ramtune.test.command.Command;
 import enginuity.ramtune.test.command.CommandImpl;
-import static enginuity.util.ParamChecker.checkNotNull;
 import static enginuity.util.ParamChecker.checkNotNullOrEmpty;
 
-public final class WriteCommandGenerator implements CommandGenerator {
-    private final Protocol protocol;
+public final class WriteCommandGenerator extends AbstractCommandGenerator {
 
     public WriteCommandGenerator(Protocol protocol) {
-        checkNotNull(protocol, "protocol");
-        this.protocol = protocol;
+        super(protocol);
     }
 
     public Command createCommand(byte[] address, byte[] data) {