sonarqube cleanup.

Author: karlnicholas

src/main/java/org/hdf5javalib/dataclass/HdfArray.java

@@ -80,14 +80,8 @@ public byte[] getBytes() {
     public String toString() {
         try {
             return datatype.getInstance(String.class, bytes);
-        } catch (InvocationTargetException e) {
-            throw new RuntimeException(e);
-        } catch (InstantiationException e) {
-            throw new RuntimeException(e);
-        } catch (IllegalAccessException e) {
-            throw new RuntimeException(e);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
+        } catch (InvocationTargetException | InstantiationException | IllegalAccessException | IOException e) {
+            throw new IllegalStateException(e);
         }
     }