Fixed quality issues.
diff --git a/code/api/src/main/java/org/apache/tamaya/spi/PropertyValue.java b/code/api/src/main/java/org/apache/tamaya/spi/PropertyValue.java
index 3e9da06..32e119e 100644
--- a/code/api/src/main/java/org/apache/tamaya/spi/PropertyValue.java
+++ b/code/api/src/main/java/org/apache/tamaya/spi/PropertyValue.java
@@ -136,6 +136,7 @@
* @param config the String based mapProperties, not {@code null}.
* @param source the source name, not {@code null}.
* @param metaData additional metadata, not {@code null}.
+ * @param prefix the prefix to add (optional).
* @return the corresponding createValue based mapProperties.
*/
public static Map<String, PropertyValue> mapProperties(Map<String, String> config, String source,
diff --git a/code/api/src/main/java/org/apache/tamaya/spi/ServiceContext.java b/code/api/src/main/java/org/apache/tamaya/spi/ServiceContext.java
index ae82c07..cf3b2ea 100644
--- a/code/api/src/main/java/org/apache/tamaya/spi/ServiceContext.java
+++ b/code/api/src/main/java/org/apache/tamaya/spi/ServiceContext.java
@@ -19,7 +19,6 @@
package org.apache.tamaya.spi;
import javax.annotation.Priority;
-import java.io.IOException;
import java.net.URL;
import java.util.*;
import java.util.function.Supplier;
@@ -169,7 +168,6 @@
* specific code to load resources, e.g. within OSGI environments.
* @param resource the resource, not {@code null}.
* @return the resources found
- * @throws IOException if load fails.
*/
default Collection<URL> getResources(String resource){
List<URL> urls = new ArrayList<>();
diff --git a/code/api/src/test/java/org/apache/tamaya/spi/ServiceContextManagerTest.java b/code/api/src/test/java/org/apache/tamaya/spi/ServiceContextManagerTest.java
index 761a429..dd6bd73 100644
--- a/code/api/src/test/java/org/apache/tamaya/spi/ServiceContextManagerTest.java
+++ b/code/api/src/test/java/org/apache/tamaya/spi/ServiceContextManagerTest.java
@@ -20,11 +20,9 @@
import org.junit.Test;
-import java.io.IOException;
import java.net.URL;
import java.util.Collection;
import java.util.Collections;
-import java.util.Enumeration;
import java.util.List;
import java.util.function.Supplier;
diff --git a/code/api/src/test/java/org/apache/tamaya/spi/TestLowerOrdinalServiceContext.java b/code/api/src/test/java/org/apache/tamaya/spi/TestLowerOrdinalServiceContext.java
index 39bc87a..ac926d9 100644
--- a/code/api/src/test/java/org/apache/tamaya/spi/TestLowerOrdinalServiceContext.java
+++ b/code/api/src/test/java/org/apache/tamaya/spi/TestLowerOrdinalServiceContext.java
@@ -18,7 +18,6 @@
*/
package org.apache.tamaya.spi;
-import java.io.IOException;
import java.net.URL;
import java.util.*;
import java.util.function.Supplier;
diff --git a/code/api/src/test/java/org/apache/tamaya/spi/TestServiceContext.java b/code/api/src/test/java/org/apache/tamaya/spi/TestServiceContext.java
index 765c032..9dddd41 100644
--- a/code/api/src/test/java/org/apache/tamaya/spi/TestServiceContext.java
+++ b/code/api/src/test/java/org/apache/tamaya/spi/TestServiceContext.java
@@ -18,7 +18,6 @@
*/
package org.apache.tamaya.spi;
-import java.io.IOException;
import java.net.URL;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
diff --git a/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceContext.java b/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceContext.java
index 9eeac72..4cb820f 100644
--- a/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceContext.java
+++ b/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceContext.java
@@ -25,7 +25,6 @@
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
-import java.io.IOException;
import java.net.URL;
import java.util.*;
import java.util.function.Supplier;
diff --git a/code/core/src/main/java/org/apache/tamaya/core/internal/converters/LocalDateTimeConverter.java b/code/core/src/main/java/org/apache/tamaya/core/internal/converters/LocalDateTimeConverter.java
index b7fedee..9983291 100644
--- a/code/core/src/main/java/org/apache/tamaya/core/internal/converters/LocalDateTimeConverter.java
+++ b/code/core/src/main/java/org/apache/tamaya/core/internal/converters/LocalDateTimeConverter.java
@@ -23,7 +23,6 @@
import org.osgi.service.component.annotations.Component;
import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
import java.util.Objects;
import java.util.logging.Level;
import java.util.logging.Logger;
diff --git a/code/core/src/main/java/org/apache/tamaya/core/internal/converters/YearMonthConverter.java b/code/core/src/main/java/org/apache/tamaya/core/internal/converters/YearMonthConverter.java
index a66bffe..0bcf52d 100644
--- a/code/core/src/main/java/org/apache/tamaya/core/internal/converters/YearMonthConverter.java
+++ b/code/core/src/main/java/org/apache/tamaya/core/internal/converters/YearMonthConverter.java
@@ -22,7 +22,6 @@
import org.apache.tamaya.spi.PropertyConverter;
import org.osgi.service.component.annotations.Component;
-import java.time.LocalTime;
import java.time.YearMonth;
import java.util.Objects;
import java.util.logging.Level;
diff --git a/code/core/src/test/java/org/apache/tamaya/core/internal/OSGIServiceContextTest.java b/code/core/src/test/java/org/apache/tamaya/core/internal/OSGIServiceContextTest.java
index 9c69039..0f079a9 100644
--- a/code/core/src/test/java/org/apache/tamaya/core/internal/OSGIServiceContextTest.java
+++ b/code/core/src/test/java/org/apache/tamaya/core/internal/OSGIServiceContextTest.java
@@ -21,7 +21,6 @@
import java.io.IOException;
import java.net.URL;
import java.util.Collection;
-import java.util.Enumeration;
import java.util.List;
import org.junit.Test;
diff --git a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationContext.java b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationContext.java
index 7d65fa5..d5ad696 100644
--- a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationContext.java
+++ b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationContext.java
@@ -19,7 +19,13 @@
package org.apache.tamaya.spisupport;
import org.apache.tamaya.TypeLiteral;
-import org.apache.tamaya.spi.*;
+import org.apache.tamaya.spi.ConfigurationContext;
+import org.apache.tamaya.spi.PropertyConverter;
+import org.apache.tamaya.spi.PropertyFilter;
+import org.apache.tamaya.spi.PropertySource;
+import org.apache.tamaya.spi.PropertyValue;
+import org.apache.tamaya.spi.ServiceContext;
+import org.apache.tamaya.spi.ServiceContextManager;
import java.io.IOException;
import java.io.ObjectInputStream;
diff --git a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationSnapshot.java b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationSnapshot.java
index 15ee71c..9d2d9cb 100644
--- a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationSnapshot.java
+++ b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/DefaultConfigurationSnapshot.java
@@ -24,8 +24,6 @@
import org.apache.tamaya.spi.ConfigurationContext;
import org.apache.tamaya.spi.PropertyConverter;
-import java.io.ObjectInputStream;
-import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.*;
import java.util.stream.Collectors;
diff --git a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/PropertyConverterManager.java b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/PropertyConverterManager.java
index 0654712..a9ea77b 100644
--- a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/PropertyConverterManager.java
+++ b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/PropertyConverterManager.java
@@ -28,7 +28,6 @@
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
-import java.net.URI;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.*;
diff --git a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/JavaConfigurationPropertySource.java b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/JavaConfigurationPropertySource.java
index 990a025..ca65c97 100644
--- a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/JavaConfigurationPropertySource.java
+++ b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/JavaConfigurationPropertySource.java
@@ -18,7 +18,6 @@
*/
package org.apache.tamaya.spisupport.propertysource;
-import org.apache.tamaya.ConfigException;
import org.apache.tamaya.spi.ChangeSupport;
import org.apache.tamaya.spi.ClassloaderAware;
import org.apache.tamaya.spi.PropertySource;
@@ -26,12 +25,9 @@
import org.apache.tamaya.spi.ServiceContextManager;
import org.apache.tamaya.spisupport.PropertySourceComparator;
-import java.io.IOException;
import java.net.URL;
import java.util.*;
-import static java.lang.String.format;
-
/**
* Provider which reads all {@value DEFAULT_SIMPLE_PROPERTIES_FILE_NAME} and
* {@value DEFAULT_XML_PROPERTIES_FILE_NAME} files found in the
diff --git a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/PropertiesResourcePropertySource.java b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/PropertiesResourcePropertySource.java
index 9cd264a..6f084aa 100644
--- a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/PropertiesResourcePropertySource.java
+++ b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/PropertiesResourcePropertySource.java
@@ -25,7 +25,6 @@
import org.apache.tamaya.spi.ServiceContextManager;
import org.apache.tamaya.spisupport.PropertySourceChangeSupport;
-import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.*;
diff --git a/code/spi-support/src/test/java/org/apache/tamaya/spisupport/services/DefaultServiceContext.java b/code/spi-support/src/test/java/org/apache/tamaya/spisupport/services/DefaultServiceContext.java
index 7bd0506..2686cdb 100644
--- a/code/spi-support/src/test/java/org/apache/tamaya/spisupport/services/DefaultServiceContext.java
+++ b/code/spi-support/src/test/java/org/apache/tamaya/spisupport/services/DefaultServiceContext.java
@@ -22,10 +22,8 @@
import org.apache.tamaya.spi.ClassloaderAware;
import org.apache.tamaya.spi.ServiceContext;
import org.apache.tamaya.spisupport.PriorityServiceComparator;
-import org.apache.tamaya.spisupport.propertysource.SimplePropertySource;
import javax.annotation.Priority;
-import java.io.IOException;
import java.net.URL;
import java.text.MessageFormat;
import java.util.*;
