Merge branch 'feature/code_enhancements' into develop

src/main/java/de/cebitec/common/sequencetools/intervals/IntegerIntervalOperations.java

@@ -21,6 +21,7 @@ import static de.cebitec.common.sequencetools.intervals.Intervals.operations;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  *
@@ -30,12 +31,12 @@ public class IntegerIntervalOperations implements IntervalOperations<Integer> {
 
     @Override
     public boolean beginsWith(Interval<Integer> fst, Interval<Integer> snd) {
-        return fst.as(Interval.Type.ZeroOpen).getStart() == snd.as(Interval.Type.ZeroOpen).getStart();
+        return Objects.equals(fst.as(Interval.Type.ZeroOpen).getStart(), snd.as(Interval.Type.ZeroOpen).getStart());
     }
 
     @Override
     public boolean endsWith(Interval<Integer> fst, Interval<Integer> snd) {
-        return fst.as(Interval.Type.ZeroOpen).getEnd() == snd.as(Interval.Type.ZeroOpen).getEnd();
+        return Objects.equals(fst.as(Interval.Type.ZeroOpen).getEnd(), snd.as(Interval.Type.ZeroOpen).getEnd());
     }
 
     @Override

src/main/java/de/cebitec/common/sequencetools/intervals/IntervalFormatter.java

@@ -18,6 +18,7 @@ package de.cebitec.common.sequencetools.intervals;
 
 /**
  *
+ * @param <T> The number type the interval uses.
  * @author Lukas Jelonek {@literal <ljelonek at cebitec.uni-bielefeld.de>}
  */
 public interface IntervalFormatter<T extends Number> {

src/main/java/de/cebitec/common/sequencetools/intervals/Intervals.java

@@ -198,4 +198,7 @@ public class Intervals {
             return o1.getStart().compareTo(o2.getStart());
         }
     }
+
+    private Intervals() {
+    }
 }

src/main/java/de/cebitec/common/sequencetools/intervals/cache/IntervalCaches.java

@@ -28,6 +28,9 @@ import java.util.List;
  */
 public class IntervalCaches {
 
+    private IntervalCaches() {
+    }
+
     /**
      * Only For debugging and testing purposes.
      */