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diff --git a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/dao/ProcessInstanceStoreDaoImpl.java b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/dao/ProcessInstanceStoreDaoImpl.java
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+/*
+ * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
+ * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
+ *
+ * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
+ * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
+ * compliance with the Licence. You may obtain a copy of the Licence at:
+ * https://joinup.ec.europa.eu/news/understanding-eupl-v12
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the Licence
+ * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the Licence for the specific language governing permissions and limitations under
+ * the Licence.
+ *
+ * This product combines work with different licenses. See the "NOTICE" text file for details on the
+ * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
+ * works that you distribute must include a readable copy of the "NOTICE" text file.
+*/
+
+package at.gv.egiz.eaaf.core.impl.idp.process.dao;
+
+import at.gv.egiz.eaaf.core.api.idp.process.ProcessInstanceStoreDao;
+import at.gv.egiz.eaaf.core.api.storage.ITransactionStorage;
+import at.gv.egiz.eaaf.core.exceptions.EaafException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+/**
+ * Database backed implementation of the {@link ProcessInstanceStoreDao} interface.
+ */
+@Service("ProcessInstanceStoreage")
+public class ProcessInstanceStoreDaoImpl implements ProcessInstanceStoreDao {
+
+  private final Logger log = LoggerFactory.getLogger(getClass());
+
+  @Autowired
+  ITransactionStorage transactionStorage;
+
+  @Override
+  public void saveOrUpdate(final ProcessInstanceStore piStore) throws EaafException {
+    try {
+      transactionStorage.put(piStore.getProcessInstanceId(), piStore, -1);
+      log.debug("Store process instance with='{}' in the database.",
+          piStore.getProcessInstanceId());
+
+    } catch (final EaafException e) {
+      log.warn("ProcessInstanceStore could not be persisted to the database.");
+      throw e;
+    }
+  }
+
+  @Override
+  public ProcessInstanceStore load(final String processInstanceId) throws EaafException {
+    log.debug("Retrieve the ProcessInstanceStore for id='{}' from the database.",
+        processInstanceId);
+    ProcessInstanceStore result = null;
+    try {
+      result = transactionStorage.get(processInstanceId, ProcessInstanceStore.class);
+
+    } catch (final Exception e) {
+      log.error("There are multiple persisted processes with the same process instance id '{}'",
+          processInstanceId);
+
+      throw e;
+    }
+
+    if (result != null) {
+      log.debug("Found process instance store for instance '{}'.", processInstanceId);
+
+    } else {
+      log.debug("Unable to find process instance store for instance '{}'.", processInstanceId);
+
+    }
+
+    return result;
+  }
+
+  @Override
+  public void remove(final String processInstanceId) throws EaafException {
+
+    log.debug("Delete the ProcessInstanceStore for id='{}' from the database.", processInstanceId);
+
+    if (transactionStorage.containsKey(processInstanceId)) {
+      transactionStorage.remove(processInstanceId);
+    } else {
+      log.trace(
+          "ProcessInstanceStore for id='{}' was not found and could therefore not be deleted.",
+          processInstanceId);
+    }
+  }
+
+}