diff --git a/src/main/java/net/ladenthin/bitcoinaddressfinder/AbstractProducer.java b/src/main/java/net/ladenthin/bitcoinaddressfinder/AbstractProducer.java
index 03a3302..30e54d7 100644
--- a/src/main/java/net/ladenthin/bitcoinaddressfinder/AbstractProducer.java
+++ b/src/main/java/net/ladenthin/bitcoinaddressfinder/AbstractProducer.java
@@ -59,8 +59,7 @@ public void initProducer() {
     }
 
     @Override
-    public void releaseProducers() {
-        this.state = ProducerState.RELEASED;
+    public void releaseProducer() {
     }
 
     @Override
@@ -167,7 +166,6 @@ void setLogger(Logger logger) {
     
     @Override
     public void interrupt() {
-        state = ProducerState.INTERRUPTED;
         shouldRun.set(false);
     }
     
diff --git a/src/main/java/net/ladenthin/bitcoinaddressfinder/Finder.java b/src/main/java/net/ladenthin/bitcoinaddressfinder/Finder.java
index 9a7c9aa..2075c68 100644
--- a/src/main/java/net/ladenthin/bitcoinaddressfinder/Finder.java
+++ b/src/main/java/net/ladenthin/bitcoinaddressfinder/Finder.java
@@ -28,7 +28,6 @@
 import java.util.Map;
 import java.util.List;
 import java.util.Random;
-import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
@@ -149,7 +148,7 @@ public void interrupt() {
         for (Producer producer : getAllProducers()) {
             producer.interrupt();
             producer.waitTillProducerNotRunning();
-            producer.releaseProducers();
+            producer.releaseProducer();
         }
         
         if (consumerJava != null) {
diff --git a/src/main/java/net/ladenthin/bitcoinaddressfinder/Producer.java b/src/main/java/net/ladenthin/bitcoinaddressfinder/Producer.java
index 191fbfd..7ca1a1a 100644
--- a/src/main/java/net/ladenthin/bitcoinaddressfinder/Producer.java
+++ b/src/main/java/net/ladenthin/bitcoinaddressfinder/Producer.java
@@ -28,6 +28,11 @@ public interface Producer extends Runnable, Interruptable, ProducerStateProvider
      * {@link #produceKeys(int, java.util.Random)} continuously.
      */
     void initProducer();
+    
+    /**
+     * Release the producer.
+     */
+    void releaseProducer();
 
     /**
      * Create multiple keys for a specific bit length using {@link Random} and
@@ -49,11 +54,6 @@ public interface Producer extends Runnable, Interruptable, ProducerStateProvider
      */
     void processSecretBase(BigInteger secretBase);
     
-    /**
-     * Release the producers.
-     */
-    void releaseProducers();
-    
     /**
      * Blocks till the producer is not running anymore.
      */
diff --git a/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerJavaSecretsFiles.java b/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerJavaSecretsFiles.java
index 4b517cb..fba05c3 100644
--- a/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerJavaSecretsFiles.java
+++ b/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerJavaSecretsFiles.java
@@ -89,7 +89,7 @@ private void logProgress() {
     }
 
     @Override
-    public void releaseProducers() {
+    public void releaseProducer() {
     }
 
     @Override
diff --git a/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCL.java b/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCL.java
index 638d0ed..d3b42de 100644
--- a/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCL.java
+++ b/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCL.java
@@ -109,11 +109,10 @@ int getFreeThreads() {
     }
 
     @Override
-    public void releaseProducers() {
+    public void releaseProducer() {
         if (openCLContext != null) {
             openCLContext.release();
             openCLContext = null;
-            this.state = ProducerState.RELEASED;
         }
     }
 
diff --git a/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerState.java b/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerState.java
index b92da7b..47ee067 100644
--- a/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerState.java
+++ b/src/main/java/net/ladenthin/bitcoinaddressfinder/ProducerState.java
@@ -19,5 +19,5 @@
 package net.ladenthin.bitcoinaddressfinder;
 
 public enum ProducerState {
-    UNINITIALIZED, INITIALIZED, RUNNING, INTERRUPTED, NOT_RUNNING, RELEASED;
+    UNINITIALIZED, INITIALIZED, RUNNING, NOT_RUNNING;
 }
diff --git a/src/test/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCLTest.java b/src/test/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCLTest.java
index 4af7328..2731dbb 100644
--- a/src/test/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCLTest.java
+++ b/src/test/java/net/ladenthin/bitcoinaddressfinder/ProducerOpenCLTest.java
@@ -77,7 +77,7 @@ public void releaseProducers_notInitialized_noExceptionThrown() throws IOExcepti
         ProducerOpenCL producerOpenCL = new ProducerOpenCL(cProducerOpenCL, mockConsumer, keyUtility, mockSecretFactory, new MockProducerCompletionCallback());
         
         // act
-        producerOpenCL.releaseProducers();
+        producerOpenCL.releaseProducer();
     }
     
     @Test
@@ -97,7 +97,7 @@ public void releaseProducers_initialized_noExceptionThrownAndOpenCLContextFreed(
         assertThat(producerOpenCL.openCLContext, notNullValue());
         
         // act
-        producerOpenCL.releaseProducers();
+        producerOpenCL.releaseProducer();
         
         // assert
         assertThat(producerOpenCL.openCLContext, nullValue());